1,720,982 research outputs found
Synthesis via organoborates of (2E,4Z)-1-oxyfunctionalized dienes, useful intermediates of natural and bioactive compounds
No full textRegio- and stereoselective epoxidation of steroidal 1,4-diene-3-ones by dimethyldioxirane: a new access to A-norsteroids and to a class of estrogen synthetase inhibitors
No full textBICYCLO[3.3.1]NONANE APPROACH TO TRIQUINANES - FORMAL SYNTHESIS OF (+/-)-DELTA-9(12)CAPNELLENE AND (+/-)-DELTA-9(12)CAPNELLENE-8-BETA-10-ALPHA-DIOL
No full textA new synthetic strategy for natural triquinanes is presented as a model study. Stereospecific rearrangement of the ready accessible bicyclo[3.3.1] nonanic acetoxychloride 6 gave the cis-pentalanic hydroxyaldehyde 5, which has been converted into the ketone 4 already reported as a key intermediate in some syntheses of the title capnellenes
New approaches to steroid hormones and vitamins via dioxiranes, reagents with biomimetic features
No full textA HIGHLY REGIOSELECTIVE AND STEREOSELECTIVE-C5 OXYFUNCTIONALIZATION OF COPROSTANE STEROIDS BY DIOXIRANES - AN IMPROVED ACCESS TO PROGESTOGEN AND ANDROGEN HORMONES
No full textCoprostane steroids are selectively oxyfunctionalized at C5 by dimethyldioxirane and methyltrifluoromethyldioxirane to give useful intermediates for bioactive compounds
Improved procedure for 3,4-dihydro-1(H)-2-benzopyran ring closure. A general access to 3-substituted isochromans
No full textRegio and diastereoselective oxygen assisted opening by monochloroborane-dimethylsulfide of epoxides to anti chlorohydrins
No full textA Highly regio- and stereoselective C5 oxyfunctionalization of coprostane steroids by dioxiranes: an improved acces to progestogen and androgen hormones
No full textOxidation of 3-arylisochromans by dimethyldioxirane. An easy route to substituted 3-arylisocoumarins
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