A general one-pot synthesis of vinyl-thiiranes and conjugated dienes
摘要:
The first general synthesis of vinyl-thiiranes 5 and an efficient preparation of conjugated dienes 6 and 7 based on thio- and selenophosphates is described. (C) 1999 Published by Elsevier Science Ltd. All rights reserved.
A general one-pot synthesis of vinyl-thiiranes and conjugated dienes
摘要:
The first general synthesis of vinyl-thiiranes 5 and an efficient preparation of conjugated dienes 6 and 7 based on thio- and selenophosphates is described. (C) 1999 Published by Elsevier Science Ltd. All rights reserved.
The O-silylated dienolates of α,β-unsaturated ketones and aldehydes can be thiophosphorylated using O,O-dialkylchlorothiophosphonates and O,O-dialkylbromodithiophosphonates to give a new class of compounds thio- and dithiophosphates 1-4 in high yield.
Highly Selective Copper-Catalyzed Ring Expansion of Vinyl Thiiranes: Application to Synthesis of Biotin and the Heterocyclic Core of Plavix
作者:Erik Rogers、Hiroshi Araki、Lindsay A. Batory、Christine E. McInnis、Jon T. Njardarson
DOI:10.1021/ja069059h
日期:2007.3.1
We report herein a new, highly selective, mild copper-catalyzed vinyl thiirane ring-expansion protocol for the formation of 2,5-dihydrothiophenes. Preliminary substrate scope and applications of this new synthetic disconnection to the formal racemic total synthesis of biotin and the synthesis of the antiplatelet blockbuster pharmaceutical agent Plavix are described.
Maciagiewicz; Dybowski; Skowronska, Polish Journal of Chemistry, 2005, vol. 79, # 3, p. 515 - 523