Stereoselective Preparation of Vitamin D Precursors Using the Intramolecular Coupling of Alkynes and Cyclopropylcarbene-Chromium Complexes: A Formal Total Synthesis of (±)-Vitamin D 3 . -The intramolecular coupling of the complexes (III) proceeds with high diastereoselectivity. Catalytic hydrogenati
Stereoselective Preparation of Vitamin D Precursors Using the Intramolecular Coupling of Alkynes and Cyclopropylcarbene−Chromium Complexes: A Formal Total Synthesis of (±)-Vitamin D 3
✍ Scribed by Yan, Jingbo; Herndon, James W.
- Book ID
- 126100948
- Publisher
- American Chemical Society
- Year
- 1998
- Tongue
- English
- Weight
- 91 KB
- Volume
- 63
- Category
- Article
- ISSN
- 0022-3263
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📜 SIMILAR VOLUMES
Metallation (n-BuLi, t-BuOK, THF) followed by quenching (DCl, occurs primarily with retention-of configuration, D20) of (S)-allenes 4a\_c whereas that of CR)-allenes 4d-e occurs mainly with inversion; the allenes 4\_were prepared from related propargyl alcohols (k??9). a-Recently, in connection with
## 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