CuBr2-catalyzed ring opening/formylation reaction of cyclopropyl carbinols with DMF to synthesize formate esters
作者:Daijiao Zhuang、Tharcisse Gatera、Rulong Yan
DOI:10.1016/j.tetlet.2020.152506
日期:2020.11
An unprecedented protocol for the synthesis of formate esters has been developed by employing N,N-dimethylformamide (DMF) as both the source of CHO and solvent. This reaction undergoes ringopening of the cyclopropyl carbinols and in situ formation of homoallylic alcohols, which reacts with DMF to give the desired products. The substrate cyclopropyl carbinols with different groups participate smoothly
Molybdenum- and Rhenium-catalyzed Isomerization of Cyclopropanemethanols to Tetrahydrofurans
作者:Yasunari Maeda、Takahiro Nishimura、Sakae Uemura
DOI:10.1246/cl.2005.790
日期:2005.6
Molybdenum- and rhenium-complexes work as affective catalysts for isomerization of a variety of cyclopropanemethanols into the corresponding tetrahydrofurans in good to high yields. The reaction may proceed via 1) [3,3]sigmatropic rearrangement involving an oxo metal cyclopropanemethanolate accompanied by the C–C bond cleavage and 2) the metal-catalyzed intramolecular hydroalkoxylation of the initially produced homoallylic alcohols.
2-phenyl- and 2-thienyl-(2)-piperidine derivatives having
申请人:Astra AB
公开号:US05714500A1
公开(公告)日:1998-02-03
Compounds of formula (I) ##STR1## in which R.sub.1 is hydrogen, R.sub.2 is hydrogen or C.sub.1-6 alkyl, R.sub.3 and R.sub.4 independently represent one or more radicals selected from hydrogen, NH.sub.2, NO.sub.2, halogen, hydroxy, C.sub.1-6 alkoxy or C.sub.1-6 alkyl, X represents S or --CH.dbd.CH-- group and pharmaceutically acceptable salts are NMDA receptor antagonists.