Compounds of Formula I:
wherein:
R1 and R2 are hydrogen or C1 to C12 linear or branched alkyl; R3 is hydrogen, C1 to C12 linear or branched alkyl, or nitrogen protecting groups; X is oxygen or nitrogen; and when X is oxygen, R4 is absent; and when X is nitrogen, R4 is C1 to C12 linear or branched alkyl or nitrogen protecting groups. The compounds are useful as reagents in 1,3-cycloaddition reactions.
式 I 的化合物:
其中
R1 和 R2 是氢或 C1 至 C12 直链或支链烷基;R3 是氢、C1 至 C12 直链或支链烷基或氮保护基团;X 是氧或氮;当 X 是氧时,R4 不存在;当 X 是氮时,R4 是 C1 至 C12 直链或支链烷基或氮保护基团。这些化合物可用作 1,3-
氰基加成反应的试剂。