Organocatalytic Mitsunobu Reactions with 3,5-Dinitrobenzoic Acid
作者:Patrick Toy、Tracy But、Jinni Lu
DOI:10.1055/s-0029-1219795
日期:2010.4
A second generation procedure for organocatalytic Mitsunobu reactions using 3,5-dinitrobenzoicacid as the pro-nucleophile has been developed. The increased acidity of this acid compared to 4-nitrobenzoic acid, which was used in the original procedure, allowed for higher isolated yields of the desired products and eliminated formation of undesired acetate byproducts.
Deprotection of benzylic esters catalysed by anhydrous ferric chloride and rhenium carbonyl compounds
作者:Timothy J. Davies、Ray V.H. Jones、W.Edward Lindsell、Colin Miln、Peter N. Preston
DOI:10.1016/s0040-4039(01)02152-9
日期:2002.1
Anhydrousferricchloride and [Re(CO)4Br]2 are shown to be useful reagents for the catalytic deprotection of benzylic esters. A suitable protecting group is p-MeC6H4CH2 with a working temperature of 50°C for debenzylation.
无水氯化铁和[Re(CO)4 Br] 2被证明是用于苄基酯催化脱保护的有用试剂。合适的保护基是对-MeC 6 H 4 CH 2,其用于脱苄基的工作温度为50°C。