292,826 research outputs found
Total synthesis of the fumiquinazoline alkaloids: Solid-phase studies
No full textWe have previously described an efficient four-step synthesis of the fumiquinazoline alkaloids (Wang, H.; Ganesan, A. J. Org. Chem. 1998, 63, 2432-2433). Here, we demonstrate that this route is readily adaptable to combinatorial synthesis on solid phase. Linear tripeptides containing a central anthranilate unit were assembled on the Wang resin and subjected to dehydration and cyclative release to yield the pyrazino[2,1-b]quinazoline-3,6-diones in high purity. To demonstrate the scope of this protocol, a small library [ca. 20 compounds] of unnatural analogues was prepared by parallel synthesis
Periacma acriuncta Wang, Li & Liu 2001
No full textPeriacma acriuncta Wang, Li & Liu, 2001 (Figure 20) Periacma acriuncta Wang, Li & Liu, 2001: 272. Wing expanse: 17.0–19.0 mm. Material examined: Holotype: „, Mt. Qingchen (30 ° 58 9 N, 103 ° 31 9 E), Sichuan Province, 11 July 1980. Additional material: 1 „, Xianfeng (29 ° 40 9 N, 109 ° 08 9 E), Hubei Province, 1280 m, 22 July 1999, coll. Houhun Li et al. Distribution: China, Hubei (Sichuan). Remarks: This species is distinguished by the uncus with a pointed process at the apex, the valva gradually narrowed from the base to the apex, and the sacculus without a distinct distal process.Published as part of Wang, S. X. & Li, H. H., 2006, Review of the genus Periacma Meyrick (Lepidoptera, Oecophoridae) from China, with descriptions of four new species, pp. 2371-2393 in Journal of Natural History 40 (41 - 43) on page 2384, DOI: 10.1080/00222930601088123, http://zenodo.org/record/523174
Periacma simaoensis Li, Wang & Yan 1996
No full textPeriacma simaoensis Li, Wang & Yan, 1996 (Figure 14) Periacma simaoensis Li, Wang & Yan, 1996: 205. Wing expanse: 16.5 mm. Material examined: Holotype: „, Simao (22 ° 48 9 N, 100 ° 58 9 E), Yunnan Province, 1325 m, 24 April 1995, coll. Guangyun Yan. Distribution: China (Yunnan). Remarks: This species resembles P. fengxianensis, but can be distinguished from the latter by the uncus not dilated apically, the sacculus heavily sclerotized distally, and the aedeagus with distal 1/6 divided into two parts.Published as part of Wang, S. X. & Li, H. H., 2006, Review of the genus Periacma Meyrick (Lepidoptera, Oecophoridae) from China, with descriptions of four new species, pp. 2371-2393 in Journal of Natural History 40 (41 - 43) on page 2382, DOI: 10.1080/00222930601088123, http://zenodo.org/record/523174
Periacma acutignatha Wang, Li & Liu 2001
No full textPeriacma acutignatha Wang, Li & Liu, 2001 (Figure 23) Periacma acutignatha Wang, Li & Liu, 2001: 275. Wing expanse: 12.5–14.5 mm. Material examined: Holotype: „, Neixiang (33 ° 02 9 N, 111 ° 50 9 E), Henan Province, 650 m, 12 July 1998, coll. Houhun Li. Paratypes: 4 „„, 3 ♀♀, 10–12 July 1998, same locality data as holotype (1 „, 1 ♀, in IZCAS). Distribution: China (Henan). Remarks: This species is related to P. erawanensis, but can be separated by the shape of the fore wing maculation, and the aedeagus with several sclerotized tooth-like distal spines in the male genitalia.Published as part of Wang, S. X. & Li, H. H., 2006, Review of the genus Periacma Meyrick (Lepidoptera, Oecophoridae) from China, with descriptions of four new species, pp. 2371-2393 in Journal of Natural History 40 (41 - 43) on page 2385, DOI: 10.1080/00222930601088123, http://zenodo.org/record/523174
Moelleriella puerensis H. Yu, Z. Q. Wang & Y. Wang 2022, sp. nov.
No full textMoelleriella puerensis H. Yu, Z. Q. Wang & Y. Wang, sp. nov. Etymology:— Named after Puer City, where the species was first collected. Holotype:— CHINA. Yunnan Province, Puer City, Simao District, Xinfang Reservoir (N22°28’12”, E 100°57’12”), alt. 1371 m, on whiteflies on abaxial surface of leaves, 7 October 2019, H. Yu (YHH10001, holotype; YFCC 8615, ex-holotype culture); Ibid., (YHH 10002, paratype; YFCC 8625, ex-paratype living culture); Ibid., (YHH 10003, paratype; YFCC 8625 ex-paratype living culture). Sexual morph:— Stromata generally effuse to thin pulvinate with pronounced ovoid tubercles on periphery of stroma, pale yellow, 1.5–3.6 mm in diameter, opaque. Hyphae loose textura intricata to epidermoidea. Perithecia 280–520 × 425–600 µm, fully embedded, ostioles orange, numerous perithecia (>10) per stroma, subglobose to ovoid. Asci 130–285 × 6.0–12.5 µm, cylindrical, hyaline. Apical cap hemispherical, 3.5–5.0 × 6.0–8.5 µm. Ascospores as long as asci, hyaline, filiform, multi-septate, smooth, disarticulating into secondary spores. Secondary spores 7.9–13 × 2.3–3.5 µm, fusiform with rounded ends. Asexual morph:— Sexual and asexual morph usually existing in the same stroma, exclusively anamorphic stromata pulvinate with sloping sides (convex), pale yellow to orange. Conidiomata aggregated in center of stroma, simple depressions of the surface without distinct rims, several conidiomata per stroma, fusing with neighboring ones, widely open. Conidial masses orange. In section, conidioma flask-shaped or irregular, shallow, 150–180 × 130–170 µm, with phialides formed in a thick compact palisade. Phialides 9–30 × 1–2 µm, cylindrical, slightly tapering towards tip, Conidia 9.7–13.4 × 1.3–2.3 µm hyaline, smooth, one-celled, fusoid, with acute ends, Paraphyses present. Colonies on PDA at 25°C slow-growing, tomentose, compact, pale yellow. Conidial masses circularly arranged towards center of colonies, abundant, confluent and deep orange. Conidia 11.2–17 × 2.1–3.1 µm. Paraphyses absent. Hirsutella -like synanamorph is present. Phialides 8.5–48.6 × 0.5–1.5 µm, flask-shaped, with a long neck 5.6–41.5 µm long. Known distribution:— Puer City, Yunnan Province, China. Notes:— Moelleriella puerensis was similar to M. raciborskii. However, the teleomorph of M. puerensis differed from M. raciborskii in having longer asci and shorter secondary spores (Liu et al. 2006). The anamorph of M. puerensis differed from M. raciborskii by having shorter conidia; the conidia formed in PDA was wider than M. raciborskii (Liu et al. 2006).Published as part of Wang, Zhi-Qin, Wang, Yao, Wang, Yuan-Bing & Yu, Hong, 2022, A new species of Moelleriella from Yunnan Province in Southwestern China, pp. 187-194 in Phytotaxa 555 (2) on pages 191-192, DOI: 10.11646/phytotaxa.555.2.7, http://zenodo.org/record/687607
Periacma ziyangensis Wang & Zheng 1995
No full textPeriacma ziyangensis Wang & Zheng, 1995 (Figure 9) Periacma ziyangensis Wang & Zheng, 1995: 7. Wing expanse: 15.0–17.0 mm. Material examined: Holotype: „, Ziyang (32 ° 33 9 N, 108 ° 32 9 E), Shaanxi Province, 350 m, 21 May 1994, coll. Jin Zhou. Allotype: ♀, 22 May 1994, same location data as holotype. Additional material: 1 „, 3 ♀♀, Ziyang, Shaanxi Province, 7 June 1973, coll. Feng Yuan and Chou Tian; 1 „, Ankang (32 ° 41 9 N, 109 ° 01 9 E), Shaanxi Province, 800 m, 5 July 2003, coll. Haili Yu; 10 „„, 11 ♀♀, Mt. Emei (29 ° 32 9 N, 103 ° 19 9 E), Sichuan Province, 24 May– 12 June 1979; 46 „„, 18 ♀♀, Chishui (28 ° 34 9 N, 105 ° 42 9 E), Guizhou Province, 390–500 m, 27–31 May 2000, coll. Yanli Du. Distribution: China (Beijing, Heilongjiang, Guizhou, Shaanxi, Sichuan) Remarks: This species is characterized by the gnathos with the ventral plate somewhat axe-like, the sacculus roundly projected near distal end, and the aedeagus with a narrow band at middle in the male genitalia; and the corpus bursae without signum but with two slightly sclerotized areas in the female genitalia.Published as part of Wang, S. X. & Li, H. H., 2006, Review of the genus Periacma Meyrick (Lepidoptera, Oecophoridae) from China, with descriptions of four new species, pp. 2371-2393 in Journal of Natural History 40 (41 - 43) on page 2379, DOI: 10.1080/00222930601088123, http://zenodo.org/record/523174
Periacma fengxianensis Wang & Zheng 1995
No full textPeriacma fengxianensis Wang & Zheng, 1995 (Figure 12) Periacma fengxianensis Wang & Zheng, 1995: 12. Wing expanse: male 12.0–14.0 mm. Material examined: Holotype: „, Zhouzhi (34 ° 10 9 N, 108 ° 12 9 E), Shaanxi Province, 1750 m, 20 July 1987, coll. Houhun Li. Allotype: ♀, Fengxian (33 ° 55 9 N, 106 ° 31 9 E), Shaanxi Province, 1600 m, 13 July 1988, coll. Houhun Li. Paratypes: 1 „, 2 ♀♀, 16– 20 July 1987, other same data as holotype; 1 „, 14 July 1988, same locality data as allotype. Additional material: 2 „„, Ningshan (33 ° 19 9 N, 108 ° 20 9 E), Shaanxi Province, 3 July 1995, coll. Hongyan Qin. Distribution: China (Shaanxi). Remarks: This species is characterized by the gnathos with the ventral margin straight and the aedeagus with the distal portion dentate at both sides in the male genitalia; and the corpus bursae with two differently shaped signa in the female genitalia.Published as part of Wang, S. X. & Li, H. H., 2006, Review of the genus Periacma Meyrick (Lepidoptera, Oecophoridae) from China, with descriptions of four new species, pp. 2371-2393 in Journal of Natural History 40 (41 - 43) on page 2380, DOI: 10.1080/00222930601088123, http://zenodo.org/record/523174
Periacma tianshuiensis Wang & Zheng 1995
No full textPeriacma tianshuiensis Wang & Zheng, 1995 (Figure 11) Periacma tianshuiensis Wang & Zheng, 1995: 9. Wing expanse: 12.0–18.0 mm. Material examined: Holotype: „, Fengxian (33 ° 55 9 N, 106 ° 31 9 E), Shaanxi Province, 1600 m, 9 July 1988, coll. Houhun Li. Allotype: ♀, Tianshui (34 ° 37 9 N, 105 ° 42 9 E), Gansu Province, 11 August 1988, coll. Xingyu Wu. Paratypes: 1 „, 10 July 1998, same locality data as holotype; 3 „„, 1 ♀, 9–10 July 1988, same locality data as allotype. Distribution: China (Gansu, Shaanxi). Remarks: This species is characterized by the sacculus not curved. It is related to P. orthiodes, but can be distinguished by the gnathos apically blunt and the sacculus much longer in the male genitalia; and the signum absent in the female genitalia.Published as part of Wang, S. X. & Li, H. H., 2006, Review of the genus Periacma Meyrick (Lepidoptera, Oecophoridae) from China, with descriptions of four new species, pp. 2371-2393 in Journal of Natural History 40 (41 - 43) on page 2380, DOI: 10.1080/00222930601088123, http://zenodo.org/record/523174
Domino C–H/N–H Allylations of Imidates by Cobalt Catalysis
No full textThe domino C-H/N-H allylation of aryl imidates was accomplished by a versatile cobalt(III) catalyst. In contrast to a tandem rhodium/palladium catalysis approach, an operationally simple cationic cobalt complex proved effective in the step-economical C-H/N-H functionalization of imidates to directly provide expedient access to decorated vinyl isoquinolines by kinetically relevant C-H activation
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