Regioselective Dihalohydration Reactions of Propargylic Alcohols: Gold-Catalyzed and Noncatalyzed Reactions
作者:Jarryl M. D'Oyley、Abil E. Aliev、Tom D. Sheppard
DOI:10.1002/anie.201405348
日期:2014.9.26
The regioselective conversion of propargylic alcohols into previously unreported α,α‐diiodo‐β‐hydroxyketones was achieved by treatment with N‐iodosuccinimide in the presence of a gold catalyst. The corresponding α,α‐dichloro‐β‐hydroxyketones were obtained by treatment with trichloroisocyanuric acid in the absence of a catalyst. The latter reaction can be extended to other alkynols. These transformations
通过在金催化剂存在下用 N-碘代琥珀酰亚胺处理,实现了炔丙醇区域选择性转化为先前未报道的 α,α-二碘-β-羟基酮。在无催化剂的情况下用三氯异氰尿酸处理得到相应的α,α-二氯-β-羟基酮。后一个反应可以扩展到其他炔醇。这些转化可用于制备潜在有用的卤化结构单元。初步机理研究表明,该反应涉及乙腈溶剂参与 5-卤代-1,3-恶嗪中间体的形成。