Chlorosulfonyl Isocyanate Reactions with <i>N</i>-(Alkoxycarbonyl)-2-azabicyclo[2.2.0]hex- 5-enes. Regiospecific Two-Atom Insertion Pathways
作者:Grant R. Krow、Walden S. Lester、Guoliang Lin、Yuhong Fang、Patrick J. Carroll
DOI:10.1021/jo020655d
日期:2003.2.1
Addition of the uniparticulate electrophile chlorosulfonylisocyanate to the nitrogen atom of N-(alkoxycarbonyl)-2-azabicyclo[2.2.0]hex-5-enes 1 is followed by ring cleavage and recombination. The parent 4-methyl, 5-methyl, 5-bromo, and 5-phenyl azabicycles 1a-f afforded novel 2,4-diaza-3-oxo-bicyclo[4.2.0]oct-7-enes 10a-f. The 3-endo-phenyl azabicycle 1g rearranged to a 6-styryl-1,3-diaza-2-oxo-cyclohex-4-ene