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.
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.