furans are conveniently synthesized from acyclic secondary 1-alkyl-2-alkynylallylic alcohol precursors via an ICl-promoted cyclization reaction. The furans generated by this method incorporate both iodine and chlorine atoms which may be useful for further elaborations via many known methods. The methodology is suitable for generating a wide array of furan products which can serve as useful building blocks
An Efficient Approach to 2-Bromoalken-3-ols by Regioselective Bromohydroxylation Reaction of Simple Allenes with NBS
作者:Wangqing Kong、Binjie Guo、Chunling Fu、Shengming Ma
DOI:10.1002/ejoc.201001676
日期:2011.4
A regioselectivebromohydroxylationreaction of simpleallenes affording 2-bromoalken-3-ols in moderate-to-good yields has been developed by using NBS as the electrophilic reagent in a mixture of 1,4-dioxane/H 2 O (1:1) at room temperature. Through this study it has been concluded that the regioselectivity is determined by various factors including steric and electronic effects of the substituents
通过在 1,4-二恶烷/H 2 O (1:1) 混合物中使用 NBS 作为亲电试剂,开发了简单丙二烯的区域选择性溴羟基化反应,以中等至良好的收率提供 2-bromoalken-3-ols在室温下。通过这项研究得出的结论是,区域选择性由各种因素决定,包括丙二烯部分取代基的空间和电子效应。
Application of LB-Phos·HBF4 in the Suzuki Coupling Reaction of 2-Bromoalken-3-ols with Alkylboronic Acids
作者:Binjie Guo、Chunling Fu、Shengming Ma
DOI:10.1002/ejoc.201200350
日期:2012.7
LB-Phos·HBF4 was used in the Suzukicouplingreaction of 2-bromoalken-3-ols with alkylboronicacids to give the coupling products in moderate to good yields. Substituents such as benzyl, phenyl, allyl, and alkyl are tolerated at the 1- and 3-positions of the 2-bromoalken-3-ols. The reactions of both primary and secondary alkylboronicacids proceed smoothly.