Wittig Rearrangements of (Heteroaryl)alkyl Propargyl Ethers − Synthesis of Allenic and Propargylic Alcohols
作者:Saverio Florio、Catia Granito、Giovanni Ingrosso、Luigino Troisi
DOI:10.1002/1099-0690(200210)2002:20<3465::aid-ejoc3465>3.0.co;2-t
日期:2002.10
α′-methylated products. Treatment in the absence of an external electrophile resulted either in allenic alcohols or in propargylic alcohols, or in mixtures of both compounds, probably arising from competing [1,2]- and [2,3]-Wittig rearrangements, in varying ratios. A high anti diastereoselectivity was observed in the propargylic alcohols produced. (© Wiley-VCH Verlag GmbH, 69451 Weinheim, Germany, 2002)
(杂芳基)烷基炔丙基醚已经合成并在-78°C下在THF中用nBuLi处理。所得的α-或α'-锂硫衍生物可以用碘甲烷捕获,得到相应的α-或α'-甲基化产物。在没有外部亲电子试剂的情况下,处理会产生丙二烯醇或炔丙醇,或两种化合物的混合物,这可能是由不同比例的 [1,2]- 和 [2,3]-Wittig 重排引起的。在产生的炔丙醇中观察到高抗非对映选择性。(© Wiley-VCH Verlag GmbH, 69451 Weinheim, Germany, 2002)