Cobalt salts such as cobalt(II) chloride catalyze allylzincation reactions of 1-aryl-1-alkynes. The allylzincations proceed in a syn fashion to form 2-allyl-1-aryl-1-alkenylzinc species. Other internal alkynes such as 6-dodecyne or 2-nonyn-1-ol are much less reactive than 1-aryl-1-alkynes.
钴盐例如
氯化钴(II)催化1-芳基-1-炔的烯丙基
锌化反应。烯丙基
锌化以顺式方式进行,形成2-烯丙基-1-芳基-1-烯基
锌物质。其他内部
炔烃如
6-十二炔或
2-壬炔-1-醇的反应性比 1-芳基-1-
炔烃低得多。