Starting from 5-unsubstituted or 5-alkyl-, aryl-, heteroarylsubstituted 3-diethylamino-4-arylisothiazole 1,1-dioxides by base induced ring opening 3-alkoxypropenamidines were synthesized in excellent yields in a mild and efficient way. When 5-bromo-3-diethylamino-4-arylisothiazole 1,1-dioxide was used as the reagent, 3,3-dialkoxy-propenamidines, a new class of unsaturated amidines, were obtained. By
由5-
氨基取代的或5-烷基-,芳基-,杂芳基取代的3-
二乙基氨基-4-芳基
噻唑1,1-二氧化物通过碱诱导的开环3-烷氧基丙en以温和而有效的方式合成。当使用5-
溴-3-
二乙基氨基-4-芳基
噻唑1,1-二氧化物作为试剂时,可得到3,3-二烷氧基-丙am类新型不饱和am。通过使用
格氏试剂,可以产生3-取代的
丙烯am。