One-pot esterification and Ritter reaction: chemo- and regioselectivity from tert-butyl methyl ether
作者:Pankaj Dawar、M. Bhagavan Raju、Ramesha A. Ramakrishna
DOI:10.1016/j.tetlet.2011.04.100
日期:2011.8
tert-Butylmethyl ether (TBME) has been effectively used as a reagent for esterification of carboxylic acids. By varying amounts of sulfuric acid, a remarkable regioselectivity in esterification has been demonstrated. Additionally, under the present reaction conditions, one-pot esterification and Ritter reaction are achieved in almost quantitative yield.
α-Bromo-α,β-unsaturatedesters and α-bromobutenolides reacted with sodium salts of methyl malonamates to afford cyclopropanes, α-methoxycarbonyllactams and 5-amino-4-methoxycarbonyl-2,3-dihydrofurans. The last compounds could be easily converted into α-methoxycarbonyl-γ-lactones. The ratio of these compounds formed is influenced by the structures of both malonamates and unsaturated compounds, especially
4-AZA INDOLE DERIVATIVES AND THEIR USE AS FUNGICIDES
申请人:Selles Patrice
公开号:US20100184598A1
公开(公告)日:2010-07-22
The present invention relates to a method of preventing and/or controlling fungal infection in plants and/or plant propagation material comprising applying to the plant or plant propagation material a fungicidally effective amount of a compound of formula (I) or a salt of N-oxide thereof. In addition, the present invention also relates to a compound of formula (I).