Indium mediated allylation and propargylation reactions of dimethyl acetals and ketals
作者:Jin Sun Kwon、Ae Nim Pae、Kyung Il Choi、Hun Yeong Koh、Youseung Kim、Yong Seo Cho
DOI:10.1016/s0040-4039(01)00042-9
日期:2001.3
Indium mediated allylation and propargylation reactions of acetals and ketals with various allyl or propargyl bromides in aqueousmedia successfully provided the corresponding homoallylic or homopropargylic (and allenylic) alcohol, respectively, in moderate to good yields. Highly chemoselectiveallylation is also described. The ketal and aryl acetal could be selectively allylated over the aliphatic
An efficient indium-mediated 2-bromoallylation of aldehydes at low temperature in aqueous DMF
作者:Yu Mi Kim、Sangku Lee、Sung Hwan Kim、Jae Nyoung Kim
DOI:10.1016/j.tetlet.2011.04.053
日期:2011.6
An efficient synthesis of 2-bromohomoallylic alcohols was carried out via an indium-mediated Barbier-type 2-bromoallylation of aldehydes in moderate yields. The reaction was performed at low temperature (-20 degrees C) in aqueous DMF in order to minimize decomposition of 2-bromoallylindium reagent to allene. (C) 2011 Elsevier Ltd. All rights reserved.
1,4-Hydroiodination of Dienyl Alcohols with TMSI To Form Homoallylic Alcohols Containing a Multisubstituted <i>Z</i>-Alkene and Application to Prins Cyclization
作者:Yongjin Xu、Zhiping Yin、Xinglong Lin、Zubao Gan、Yanyang He、Lu Gao、Zhenlei Song
DOI:10.1021/acs.orglett.5b00485
日期:2015.4.17
A regioselective 1,4-hydroiodination of dienyl alcohols has been developed using trimethylsilyl iodide as Lewis acid and iodide source. A range of homoallylic alcohols containing a multisubstituted Z-alkene was synthesized with good to excellent configurational control. The approach was applied in sequential hydroiodination/Prins cyclization to afford multisubstituted tetrahydropyrans diastereoselectively.