Stereoselective Construction of Eight-Membered Oxygen Heterocycles by Brook Rearrangement-Mediated [3 + 4] Annulation
作者:Yuji Sawada、Michiko Sasaki、Kei Takeda
DOI:10.1021/ol0492243
日期:2004.6.1
[reaction: see text] A newly developed strategy for eight-membered oxygen heterocycle construction via [3 + 4] annulation is described. The method involves the combination of beta-substituted acryloylsilanes and enolates of 6-oxacyclohept-2-en-1-one. A unique feature of this annulativeapproach is its capacity to generate eight-membered ring systems containing useful functionalities for further synthetic
The synthesis of six-, seven- and eight-membered 3-oxo oxacycloalkenes by using ring-closing metathesis has been achieved from 1-(omega-alkenyloxy)-but-3-en-2-ones. (C) 2002 Elsevier Science Ltd. All rights reserved.
Synthesis of 3-oxooxa- and 3-oxoazacycloalk-4-enes by ring-closing metathesis. Application to the synthesis of an inhibitor of cathepsin K
3-Oxooxa- and 3-oxoazacycloalk-4-enes were obtained with good yield from 1-(omega-alkenyloxy)- and 1-(omega-alkenylamino)-but-3-en-2-ones by using a ring-closing metathesis. This methodology has been used to synthesize an inhibitor of cathepsin K. (C) 2007 Elsevier Ltd. All rights reserved.