Efficient Synthesis of 7-, 8-, and 9-Membered Cyclic Allyltitanium Compounds and Their Stereoselective Addition Reaction with Aldehydes and Imines. -The reaction of the cyclic allylic compounds (I) with in situ generated (ฮท2-propene)Ti(O-iPr)2 gives allylic titanium compounds via an oxidative pathw
Efficient synthesis of 7-, 8- and 9-membered cyclic allyltitanium compounds and their stereoselective addition reaction with aldehydes and imines
โ Scribed by Shinichi Hikichi; Yuan Gao; Fumie Sato
- Book ID
- 104256849
- Publisher
- Elsevier Science
- Year
- 1997
- Tongue
- French
- Weight
- 251 KB
- Volume
- 38
- Category
- Article
- ISSN
- 0040-4039
No coin nor oath required. For personal study only.
โฆ Synopsis
Reaction of 7-, 8-and 9-membered cyclic allylic compounds 2 with (r$propene)Ti(O-i-Pr)2 ( 1) via an oxidative addition pathway provides the corresponding allylic titanium compounds, which, in turn, react with aldehydes and imines stereoselectively, thus providing an eflicient and stereoselective method for synthesi.&g cycloakenes having a side chain at the allylic position.
๐ SIMILAR VOLUMES
Ti(II)-mediated cyclization of readily accessible optically active secondary 2,7-and 2,8-enyn-1-ol derivatives enables the selective preparation of any one of the four possible stereoisomers of the cyclized product with high optical purity.