𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Regioselective synthesis of a-ring halogenated derivatives of 17α-ethynyloestradiol

✍ Scribed by Philip C. Bulman Page; Fazal Hussain; Nicholas M. Bonham; Paul Morgan; James L. Maggs; B.Kevin Park


Book ID
108371673
Publisher
Elsevier Science
Year
1991
Tongue
French
Weight
550 KB
Volume
47
Category
Article
ISSN
0040-4020

No coin nor oath required. For personal study only.


📜 SIMILAR VOLUMES


Synthesis of 17α-bromovinyl- and 17α-iod
✍ Helmut Hofmeister; Henry Laurent; Paul-Eberhard Schulze; Rudolf Wiechert 📂 Article 📅 1986 🏛 Elsevier Science 🌐 French ⚖ 254 KB

Sumnary -Depending upon the reaction conditions, norethisterone (1) and its ketal 2 can be transformed with tributyltin hydride to either the (E)-or (Z)-17a-(2-tributylstannylvinyl)-nortestosterone derivatives 3, 8 and 13. Further treatment with N-bromo-or N-iodosuccinimide yields the corresponding

Synthesis of ring-halogenated histidines
✍ Rahul Jain; Bianca Avramovitch; Louis A. Cohen 📂 Article 📅 1998 🏛 Elsevier Science 🌐 French ⚖ 733 KB

Series of ring-halogenated histidines and histamines have been synthesized horn the suitably protected parent bioimidazoles. The 5-X and 2,5-X\*-derivatives are obtained by dii electrophilic halogenation while 2-X derivatives (X= Br and I) are prepared by rcgiospecific electrophilic dehalogenation a

Regioselective epoxide ring opening. Ste
✍ Michelangelo Gruttadauria; Renato Noto; Serena Riela 📂 Article 📅 1998 🏛 Journal of Heterocyclic Chemistry 🌐 English ⚖ 339 KB

## Abstract The stereoselective synthesis of a 2‐substituted tetrahydropyran with adjacent alkoxy‐bearing stereogenic centre is described. The key steps of this synthesis were the stereoselective epoxidation of an allylic alcohol and the regioselective epoxide ring opening by lithium aluminum hydri