<i>N,N ′</i>-Diiodo-<i>N,N′</i>-1,2-ethanediylbis<i>(p</i>-toluenesulfonamide) as an Efficient Catalyst for Acetylation of Alcohols, Phenols, Amines, and Thiols Under Solvent-Free Conditions
作者:Ramin Ghorbani-Vaghei、Zahra Toghraei-Semiromi
DOI:10.1080/10426500903241721
日期:2010.7.30
N,N′-Diiodo-N,N′-1,2-ethanediylbis(p-toluenesulfonamide) (NIBTS) is a highly efficientcatalyst for the acetylation of alcohols, phenols, amines, and thiols undersolvent-freeconditions. Primary, secondary, tertiary alcohols; phenols; amines; and thiols can be easily acetylated in good to excellent yields at 80 °C.
N,N'-Diiodo-N,N'-1,2-乙二基双(对甲苯磺酰胺)(NIBTS)是一种在无溶剂条件下用于醇、酚、胺和硫醇乙酰化的高效催化剂。伯、仲、叔醇;酚类;胺类;硫醇可以很容易地乙酰化,在 80 °C 下收率非常好。
Studies of the tandem Mukaiyama aldol-lactonization (TMAL) reaction: A concise and highly diastereoselective route to β-lactones applied to the total synthesis of the potent pancreatic lipase inhibitor, (−)-Panclicin D
作者:Hong Woon Yang、Cunxiang Zhao、Daniel Romo
DOI:10.1016/s0040-4020(97)01029-6
日期:1997.12
A concise and highly diastereoselective route to β-lactones has been developed based on a tandemMukaiyamaaldol-lactonization employing thiopyridylsilylketene acetals and various aldehydes. (−)-Panclicin D, a potent pancreatic lipase inhibitor, was synthesized using this methodology. Recent optimization and extensions of this method are described which include variation of the silyl group and leaving