作者:Rolf Huisgen、Xingya Li、Grzegorz Mloston、Claudia Fulka
DOI:10.1002/(sici)1099-0690(200005)2000:9<1695::aid-ejoc1695>3.0.co;2-4
日期:2000.5
(4) eliminates N2 at −45 °C and generates thiobenzophenone S-methylide (5), which is intercepted by dipolarophiles. The 1,3-cycloadditions of 5 with thiones (aromatic and aliphatic thioketones, dithioesters, trithiocarbonate) furnish 1,3-dithiolanes 7, in which the substituents, even voluminous ones, appear in the proximal 4- and 5-positions. The reaction of 5 with adamantanethione furnishes 7h and
2,5-二氢-2,2-二苯基-1,3,4-噻二唑(4)在-45°C时消除N 2并生成硫代二苯甲酮S-甲基化物(5),其被双亲亲核剂截留。5与硫酮(芳香族和脂肪族硫酮,二硫酯,三硫代碳酸酯)的1,3-环加成反应提供1,3-二硫杂环戊烷7,其中取代基,即使是大量的取代基,也都出现在近端4位和5位。5与金刚烷硫酮的反应以4:1的比例提供7h和4,4,5,5-四苯基-1,3-二硫杂环戊烷(7a);涉及亚甲基转移,并讨论了其机理。环加合物7f衍生自5和5的二苯基三硫代碳酸酯经历异构化,该异构化由电离和开环组成,从而导致乙烯酮二硫缩醛结构。