Acid-facilitated debenzylation of N-Boc, N-benzyl double protected 2-aminopyridinomethyl pyrrolidine derivatives
摘要:
2-Aminopyridinomethyl pyrrolidines represent a class of highly potent and selective neuronal nitric oxide synthase inhibitors. Conditions for a Mitsunobu reaction of a naphthol and a hindered secondary alcohol were optimized to give good to excellent yields. A key step in the synthesis of these inhibitors is the deprotection of the benzyl group from the N-Boc and N-Bn double protected 2-aminopyridine ring at a late stage of the synthesis, which has been proven difficult in our previous syntheses. Acetic acid was found to facilitate the N-Bn deprotection. (C) 2011 Elsevier Ltd. All rights reserved.
Compounds and related methods for selective inhibition of neuronal nitric oxide synthase over inducible and endothelial isoforms, such compounds as can provide reduced cationic character and enhanced bioavailability.
US8557552B2
申请人:——
公开号:US8557552B2
公开(公告)日:2013-10-15
Acid-facilitated debenzylation of N-Boc, N-benzyl double protected 2-aminopyridinomethyl pyrrolidine derivatives
作者:Haitao Ji、Qing Jing、Jinwen Huang、Richard B. Silverman
DOI:10.1016/j.tet.2011.12.013
日期:2012.2
2-Aminopyridinomethyl pyrrolidines represent a class of highly potent and selective neuronal nitric oxide synthase inhibitors. Conditions for a Mitsunobu reaction of a naphthol and a hindered secondary alcohol were optimized to give good to excellent yields. A key step in the synthesis of these inhibitors is the deprotection of the benzyl group from the N-Boc and N-Bn double protected 2-aminopyridine ring at a late stage of the synthesis, which has been proven difficult in our previous syntheses. Acetic acid was found to facilitate the N-Bn deprotection. (C) 2011 Elsevier Ltd. All rights reserved.