Harvesting short-lived hypoiodous acid for efficient diastereoselective iodohydroxylation in Crixivan® synthesis
作者:Carl R LeBlond、Kai Rossen、Frank P Gortsema、Ilia A Zavialov、Steven J Cianciosi、Arthur T Andrews、Yongkui Sun
DOI:10.1016/s0040-4039(01)01863-9
日期:2001.12
The evasive hypoiodous acid is generated in situ from NaOCl and NaI and used efficiently for clean iodohydroxylation of 1, producing the Crixivan® intermediate 2 in high yield with highly efficient 1,3-asymmetric induction. This pH-tunable process allows HOI generation at a pH optimal for supressing byproduct formation in pH-sensitive iodohydroxylation reactions.
避让次碘酸在选自次氯酸钠和NaI原位产生和用于清洁iodohydroxylation有效地使用1,产生那韦®中间体2与高效1,3-不对称诱导以高收率。此pH可调过程允许在最适pH的HOI生成,以抑制pH敏感的碘代羟基化反应中副产物的形成。