Isomerization of oxazolinyl allylic alcohols: synthesis of 3-alkylidene-2-iminooxetanes
摘要:
Oxazolinyl allylic alcohols 2 convert smoothly into 3-alkylidene-2-iminooxetanes 3 and dienic carboxylic acids 7 simply upon treatment with aqueous HCl. (C) 2003 Elsevier Science Ltd. All rights reserved.
Synthesis of Allylic Alcohols from Oxazolinyloxiranes
作者:Filippo M. Perna、Vito Capriati、Saverio Florio、Renzo Luisi
DOI:10.1021/jo026234d
日期:2002.11.1
Lithium diisopropylamide (LDA) (or s-BuLi/TMEDA) in diethyl ether promotes smooth ring opening of oxazolinyl alkyl oxiranes to give oxazolinyl allylicalcohols, which are masked Baylis-Hillman adducts, in good to excellent yields. An E2-E1cb-like syn-beta-elimination is proposed to explain the easy base-promoted isomerization of the studied oxiranes.
Isomerization of oxazolinyl allylic alcohols: synthesis of 3-alkylidene-2-iminooxetanes
作者:Filippo M. Perna、Vito Capriati、Saverio Florio、Renzo Luisi
DOI:10.1016/s0040-4039(03)00669-5
日期:2003.4
Oxazolinyl allylic alcohols 2 convert smoothly into 3-alkylidene-2-iminooxetanes 3 and dienic carboxylic acids 7 simply upon treatment with aqueous HCl. (C) 2003 Elsevier Science Ltd. All rights reserved.