Isothiazoles. Part IV. Cycloaddition reactions of diaryl-oxazolones and münchnones to 3-diethylamino-4-(4-methoxyphenyl)-isothiazole 1,1-dioxide: a new synthesis of triarylpyrroles
作者:Paola Baggi、Francesca Clerici、Maria L Gelmi、Sabrina Mottadelli
DOI:10.1016/0040-4020(94)01110-l
日期:1995.2
with oxazolones 2 and münchnones 7 affording with satisfactory yield 3-diethylamino-4,6-diaryl-3a,4-dihydro-3a-(4-methoxyphenyl)-6aH-pyrrolo[3,4-d]isothiazole 1,1-dioxides 4 and 3-diethylamino-4,6-diaryl-5-alkyl-3a-(4-methoxyphenyl)-pyrrolo[3,4-d]isothiazole 1,1-dioxides 8, respectively. The behaviour of the cycloadducts towards elevated temperatures and/or basic conditions was investigated. Under these