Method of synthesizing acetonide-protected catechol-containing compounds and intermediates produced therein
申请人:Northwestern University
公开号:US08227628B2
公开(公告)日:2012-07-24
The inventors disclose here a novel, facile approach to the synthesis of acetonide-protected catechol-containing compounds having at least one amine group. In specific embodiments, the invention provides novel methods of synthesizing 3,4-dihydroxyphenylalanine (H-DOPA(acetonide)-OH (6)), Fmoc-protected H-DOPA(acetonide)-OH (Fmoc-DOPA(acetonide)-OH (7)), Fmoc-protected dopamine (Fmoc-dopamine(acetonide) (10)), TFA-protected dopamine (TFA-dopamine(acetonide) (13)) and acetonide-protected 4-(2-aminoethyl)benzene-1,2-diol (acetonide-protected dopamine (14)).
Method of Synthesizing Acetonide-Protected Catechol-Containing Compounds and Intermediates Produced Therein
申请人:Messersmith Phillip B.
公开号:US20100087622A1
公开(公告)日:2010-04-08
The inventors disclose here a novel, facile approach to the synthesis of acetonide-protected catechol-containing compounds having at least one amine group. In specific embodiments, the invention provides novel methods of synthesizing 3,4-dihydroxyphenylalanine (H-DOPA(acetonide)-OH (6)), Fmoc-protected H-DOPA(acetonide)-OH (Fmoc-DOPA(acetonide)-OH (7)), Fmoc-protected dopamine (Fmoc-dopamine(acetonide) (10)), TFA-protected dopamine (TFA-dopamine(acetonide) (13)) and acetonide-protected 4-(2-aminoethyl)benzene-1,2-diol (acetonide-protected dopamine (14)).
Acetonide protection of dopamine for the synthesis of highly pure N-docosahexaenoyldopamine
作者:Zhongqiang Liu、Bi-Huang Hu、Phillip B. Messersmith
DOI:10.1016/j.tetlet.2010.02.089
日期:2010.5
Direct acetonide protection of the catechol of dopamine has proven to be problematic due to the formation of Pictet-Spengler isoquinolines. Here we report an efficient method for acetonide protection of dopamine, allowing the preparation of a dopamine prodrug without complications from the Pictet-Spengler reaction. Acetonide-protected dopamine was first synthesized by pre-protecting the amino group with phthaloyl followed by refluxing with 2,2-dimethoxypropane in the presence of MOH. Further work demonstrated that Fmoc and trifluoroacetyl were also suitable N-protective groups, while Boc-protected dopamine gave an isoquinoline product. Acetonide-protected dopamine was coupled to DHA (all cis-4,7,10,13,16,19-docosahexaenoic acid) to produce the N-DHA-dopamine prodrug with high purity. (C) 2010 Elsevier Ltd. All rights reserved.