(1-Nosyl-5-nitroindol-3-yl)methyl Ester: A Novel Protective Group for Carboxylic Acids
作者:Takuya Nishimura、Kouhei Yamada、Tohru Takebe、Satoshi Yokoshima、Tohru Fukuyama
DOI:10.1021/ol8008655
日期:2008.6.1
(1-nosyl-5-nitroindol-3-yl)methyl esters as a novel protective group for carboxylic acid is fully demonstrated. The novel protective group is stable under a broad range of conditions and can easily be deprotected under the mild conditions used for removal of the nosyl (Ns) group. It is orthogonal to the existing protective groups for carboxylic acids such as t-butyl and allyl esters.
充分证明了(1-戊基-5-硝基吲哚-3-基)甲基酯作为羧酸的新型保护基的有效性。该新型保护基在广泛的条件下是稳定的,并且在用于除去壬基(Ns)基团的温和条件下可以容易地被脱保护。它与现有的羧酸保护基团(例如叔丁基酯和烯丙基酯)正交。