Synthesis of 5,5′-bis-benzofurans and 5-arylbenzofurans
摘要:
A facile synthetic route of the tandem Claisen rearrangement/aerobic Wacker-type oxidative cyclization toward 5,5'-bis-benzofurans 2 and 5-arylbenzofurans 3 starting with bis-allyl aryl ethers 4 or allyl aryl ethers 5 with good yields is described. Skeletons 4 or 5 was prepared from 4,4'-biphenol (1) in moderate total yields via the known protocol. (C) 2013 Elsevier Ltd. All rights reserved.
Polyphosphoric Acid Promoted Synthesis of 10,11-Dihydrobenzo[<i>j</i>]fluoranthen-12-one
作者:Meng-Yang Chang、Tein-Wei Lee、Ming-Hao Wu
DOI:10.1021/ol3006979
日期:2012.5.4
A straightforward synthesis of 3,8-dimethoxy-10,11-dihydrobenzo[j]fluoranthen-12-ones 1 is reported in a seven-step route from biphenyl-4,4′-diol 2 via the transformation of a double Claisen rearrangement, cross metathesis with ethyl acrylate, and polyphosphoricacid (PPA)-promoted Friedel–Crafts electrophilic benzannulation in good yields.
Synthesis of 5,5′-bis-benzofurans and 5-arylbenzofurans
作者:Meng-Yang Chang、Shin-Ying Lin、Chieh-Kai Chan
DOI:10.1016/j.tet.2013.02.031
日期:2013.4
A facile synthetic route of the tandem Claisen rearrangement/aerobic Wacker-type oxidative cyclization toward 5,5'-bis-benzofurans 2 and 5-arylbenzofurans 3 starting with bis-allyl aryl ethers 4 or allyl aryl ethers 5 with good yields is described. Skeletons 4 or 5 was prepared from 4,4'-biphenol (1) in moderate total yields via the known protocol. (C) 2013 Elsevier Ltd. All rights reserved.
Synthesis of [3,3′-Di-<i>sec</i>-butyl-4′-(2-dimethylaminoethoxy)biphenyl-4-yl-oxy]acetic Acid
作者:Mengyang Chang、Chiehkai Chan
DOI:10.1002/cjoc.201400032
日期:2014.3
A modified synthetic route of [3,3′‐di‐sec‐butyl‐4′‐(2‐dimethylaminoethoxy)biphenyl‐4‐yloxy]aceticacid (1) with high total yield of 44% from biphenyl‐4,4′‐diol (2) is described.