Zinc-mediated α-regioselective Barbier-type cinnamylation reactions of aldehydes, ketones and esters
作者:Li-Ming Zhao、Hua-Shuai Gao、De-Feng Li、Jing Dong、Lan-Lin Sang、Jie Ji
DOI:10.1039/c7ob00723j
日期:——
Experimental results suggest that the reactions proceed through the radical pathway. In addition, the reaction was found to be scalable to the gram-scale and the one-potprotocol is also applicable to less reactive esters leading to bishomoallylic alcohols which were valuable intermediates for desymmetrizing intramolecular Heck cyclization, allowing for the elaboration to functionalized building blocks.
Synthesis of bicyclic tetrahydrofurans from linear precursors using manganese(<scp>iii</scp>) acetate
作者:Anne-Caroline Chany、Léo B. Marx、Jonathan W. Burton
DOI:10.1039/c5ob01091h
日期:——
Cyclisation of a range of alkoxy-malonates in the presence of manganese(iii) acetate gives rise to bicyclic lactone/THFs and lactone/lactones in synthetically useful yields and diastereoselectivities.
A stereoselective route to trans-2,5-disubstituted tetrahydrofurans
作者:Ho Kang Sung、Seop Hwang Tae、Joo Kim Wan、Ki Lim Joong
DOI:10.1016/s0040-4039(00)97993-0
日期:1990.1
An efficient stereocontrolled route to trans-2,5-disubstitutedtetrahydrofurans from trans-4-phenyl-3-buten-1-ol derivatives 2–6 has been developed by using phenylselenyl chloride with zinc bromide in DME at −55°C.