ChemInform Abstract: Synthesis of (23R)- and (23S)-23H-Isocalysterols, Marine Sterols with a Cyclopropene Moiety in the Side Chain.

Synthesis of (23R)- and (23S)-23H-Isocal

Synthesis of (23R)- and (23S)-23H-Isocalysterols, Marine Sterols with a Cyclopropene Moiety in the Side Chain

✍ Alicja Kurek-Tyrlik; Kazimierz Minksztym; Jerzy Wicha 📂 Article 📅 2000 🏛 John Wiley and Sons 🌐 English ⚖ 367 KB

A synthesis of (23R)-and (23S)-23H-calysterols 2a and 2b from pregnanoic ester 10 is reported. Alkylation of 10 with dibromide 19b, followed by reduction of the carboethyloxy group to a methyl group, afforded (Z)-vinylic bromide 22. Dibromocyclopropanation of 22 yielded the diastereomeric tri-

ChemInform Abstract: Nitrile Oxide Synth

ChemInform Abstract: Nitrile Oxide Synthesis of the Side Chain in Vitamin D3 Metabolites and Their Analogues with Functional Substituents at C23.

✍ V. A. Khripach; V. N. Zhabinskii; N. D. Pavlovskii 📂 Article 📅 2010 🏛 John Wiley and Sons ⚖ 29 KB 👁 1 views

## Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable v

ChemInform Abstract: Model Studies for t

ChemInform Abstract: Model Studies for the Synthesis of the Marine Hepatotoxin Cylindrospermopsin. Preparation of a Bicyclic Guanidine with the Hydroxymethyluracil Side Chain.

✍ B. B. SNIDER; C. XIE 📂 Article 📅 2010 🏛 John Wiley and Sons ⚖ 32 KB 👁 1 views

## Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable v

ChemInform Abstract: Synthesis of 20α-Me

ChemInform Abstract: Synthesis of 20α-Methylsteroids with an Isoxazoline Ring in the Side Chain

✍ R. P. Litvinovskaya; S. V. Drach; V. A. Khripach 📂 Article 📅 2010 🏛 John Wiley and Sons ⚖ 30 KB

## Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable v

ChemInform Abstract: Synthesis of (23R)- and (23S)-23H-Isocalysterols, Marine Sterols with a Cyclopropene Moiety in the Side Chain.

✦ Synopsis

Abstract