Tandem [3 + 2] Cycloaddition Reaction of Azo-alkenes and Thiocyanic Acid: Extending the Scope of the Classical "Criss-Cross" Cycloaddition Reaction
作者:Joachim G. Schantl、Peter Nádeník
DOI:10.1055/s-1998-1759
日期:1998.7
Phenylazoalkenes 4 with full substitution at the terminal carbon atom react with thiocyanic acid affording 2,3,5,6,7,7a-hexahydro-3-phenyl-1H-imidazo[1,5-b][1,2,4]triazole-2,5-dithiones 8. The bicyclic compounds 8 result from two consecutive [3 + 2] cycloaddition steps, thus adding a novel facet to the classical "Criss-cross" reaction.
全取代末端碳原子的苯基偶氮烯4与硫氰酸反应,生成2,3,5,6,7,7a-六氢-3-苯基-1H-咪唑并[1,5-b][1,2,4]三唑-2,5-二硫酮8。双环化合物8是通过两次连续的[3 + 2]环加成步骤生成的,从而为经典的“交叉”反应添加了新的层面。