most underused alcohol protectinggroups. After having developed an easy and useful protocol for its introduction, we offer here a simple procedure for its removal by treatment with anhydrous CeCl3 and NaI in CH3CN. The procedure led to the successful cleavage of aliphatic and aromatic tert-butyl ethers and was compatible with various other functionalities and protectinggroups present in the molecule
Compounds effective in inhibiting replication of Hepatitis C virus (“HCV”) are described. This invention also relates to processes of making such compounds, compositions comprising such compounds, and methods of using such compounds to treat HCV infection.
Unusual and Unexpected Reactivity of <i>t-</i>Butyl Dicarbonate (Boc<sub>2</sub>O) with Alcohols in the Presence of Magnesium Perchlorate. A New and General Route to <i>t-</i>Butyl Ethers
[reaction: see text] A new mild method for protecting alcohols as t-butylethers is reported. The reaction proceeds with Mg(ClO4)2 and Boc2O and shows general applicability. The deprotection of t-butylethers has also been revisited. Preliminary results indicate the CeCl3 x 7H2O/NaI system is a very suitable catalyst for their removal.
[反应:见正文]据报道,一种新的温和的保护叔丁醚醇的方法。反应与Mg(ClO4)2和Boc2O进行,显示出一般的适用性。也已经重新考虑了叔丁基醚的脱保护。初步结果表明,CeCl3 x 7H2O / NaI体系是非常适合去除它们的催化剂。
Substituted 3-Amino-Pyrrolidino-4-Lactams
申请人:Piotrowski David W.
公开号:US20070299076A1
公开(公告)日:2007-12-27
The invention provides compounds of formula (1),
and the pharmaceutically acceptable salt thereof, wherein R
1
, n and R
2
are as described herein; compositions thereof; and uses thereof.