BtCH<sub>2</sub>TMS-Assisted Homologation of Carboxylic Acids: A Safe Alternative to the Arndt−Eistert Reaction
作者:Alan R. Katritzky、Suoming Zhang、Yunfeng Fang
DOI:10.1021/ol0002370
日期:2000.11.1
3-benzotriazole (BtCH(2)TMS) (1) to afford N-(acylmethyl)benzotriazoles 3a-f, followed by (ii) conversion of 3a-f with triflicanhydride into RC(OTf)=CHBt 4a-f, and (iii) the subsequent reaction of 4a-c with NaOCH(3) followed by 1N HCl to afford esters RCH(2)CO(2)R' 7a-c in overall yields of 50-70%. For the aliphatic compounds 5d-f, treatment of 5d-f with p-toluenesulfonic acid followed by TBAF/THF
One-Carbon Homologation of Carboxylic Acids via BtCH<sub>2</sub>TMS: A Safe Alternative to the Arndt−Eistert Reaction
作者:Alan R. Katritzky、Suoming Zhang、Abdel Haleem Mostafa Hussein、Yunfeng Fang、Peter J. Steel
DOI:10.1021/jo0017640
日期:2001.8.1
Carboxylicacids are converted into the corresponding homologated acids or esters, using easily available 1-(trimethylsilylmethyl)benzotriazole (1) as a one-carbon synthon. The effectiveness of the reaction has been investigated on six aryl and seven alkyl carboxylicacids.