Introduction of 9-fluorenylmethyloxycarbonyl, trichloroethoxycarbonyl, and benzyloxycarbonyl amine protecting groups into O-unprotected hydroxyamino acids using succinimidyl carbonates
N-羟基丁二酰亚胺 、 二环己胺 以
丙酮 为溶剂,
以95%的产率得到dicyclohexylamine salt of N-hydroxysuccinimide
参考文献:
名称:
Introduction of 9-fluorenylmethyloxycarbonyl, trichloroethoxycarbonyl, and benzyloxycarbonyl amine protecting groups into O-unprotected hydroxyamino acids using succinimidyl carbonates
1,1-Dioxonaphtho[1,2-<i>b</i>]thiophene-2-methyloxycarbonyl (α-Nsmoc) and 3,3-Dioxonaphtho[2,1-<i>b</i>]thiophene-2-methyloxycarbonyl (β-Nsmoc) Amino-Protecting Groups
作者:Louis A. Carpino、Adel Ali Abdel-Maksoud、Dumitru Ionescu、E. M. E. Mansour、Mohamed A. Zewail
DOI:10.1021/jo062397g
日期:2007.3.1
mechanistically similar to that previously established for the Bsmoc derivative in that the reaction is initiated by Michael addition to the β-carbon atom of the α,β-unsaturatedsulfone system. Application of α- and β-Nsmoc amino acids to the solid-phase synthesis of two model peptides was examined. An advantage of the α-Nsmoc system over the long-known Bsmoc system proved to be the milder conditions needed for
在Bsmoc相关的,基于萘噻吩砜基的氨基保护基的三个理论上可能的替代基团中,最易获得的两个衍生物α-和β-Nsmoc类似物已作为Bsmoc残基的替代品进行了研究。油性受保护的氨基酸或氨基酸氟化物。所有的萘系统均提供易于处理的固体氨基酸衍生物。用作引入α-Nsmoc保护基的关键试剂的中间体砜醇11很容易由α-四氢萘酮制备(方案1)。对应的β-类似物17类似地,在小规模上进行制备,但由于β-四氢萘酮的成本高,因此将罗丹宁与α-萘醛反应的替代途径用于大规模工作(方案2)。所有蛋白原氨基酸都转化为它们的α-和β-Nsmoc衍生物。脱保护研究表明,哌啶对脱保护的反应性依次为α-Nsmoc> Bsmoc>β-Nsmoc。1个1 H NMR实验表明,两个新系统的解封在机理上与先前为Bsmoc衍生物建立的解封在机理上相似,因为该反应是通过将迈克尔加成到α,β-不饱和砜系统的β-碳原子上而引发的。研究了α-
New fluorous tagging and scavenging reactants and methods of synthesis and use thereof
申请人:——
公开号:US20040073054A1
公开(公告)日:2004-04-15
The present invention includes methods and compositions for increasing the fluorous nature of an organic compound by reacting it with at least one fluorous compound to produce a fluorous tagged organic compound. The increased fluorous nature of the fluorous tagged organic compound can then be utilized to separate the fluorous organic compound from untagged reagents, reactants, catalysts and/or products derived therefrom. The resultant fluorous tagged organic compound can be subjected to subsequent chemical transformations, wherein the fluorous nature of the tagged compound is utilized to increase the ease of separation of the fluorous tagged organic compound from untagged reagents, reactants, catalysts and/or products derived therefrom, after each chemical transformation. The chemical transformations result in a second fluorous tagged organic compound wherein the fluorous nature of the second fluorous tagged organic compound can then be reduced by removing the fluorous group therefrom, thereby producing a second organic compound that may be employed as a pharmaceutical compound or intermediate, or a combinatorial library component.
Fluorous tagging and scavenging reactants and methods of synthesis and use thereof
申请人:Zhang Wei
公开号:US20060128957A1
公开(公告)日:2006-06-15
The present invention includes methods and compositions for increasing the fluorous nature of an organic compound by reacting it with at least one fluorous compound to produce a fluorous tagged organic compound. The increased fluorous nature of the fluorous tagged organic compound can then be utilized to separate the fluorous organic compound from untagged reagents, reactants, catalysts and/or products derived therefrom. The resultant fluorous tagged organic compound can be subjected to subsequent chemical transformations, wherein the fluorous nature of the tagged compound is utilized to increase the ease of separation of the fluorous tagged organic compound from untagged reagents, reactants, catalysts and/or products derived therefrom, after each chemical transformation. The chemical transformations result in a second fluorous tagged organic compound wherein the fluorous nature of the second fluorous tagged organic compound can then be reduced by removing the fluorous group therefrom, thereby producing a second organic compound that may be employed as a pharmaceutical compound or intermediate, or a combinatorial library component.
The 2-chloro-3-indenylmethyloxycarbonyl and benz[f]inden-3-ylmethyloxycarbonyl base-sensitive amino-protecting group. Application to an inverse Merrifield approach to peptide synthesis
作者:Louis A. Carpino、Beri J. Cohen、Yao Zhong Lin、Kenton E. Stephens、Salvatore A. Triolo
DOI:10.1021/jo00288a042
日期:1990.1
[EN] FLUOROUS TAGGING AND SCAVENGING REACTANTS AND METHODS OF SYNTHESIS AND USE THEREOF<br/>[FR] NOUVEAU REACTIFS DE MARQUAGE AU FLUOR ET DE PIEGEAGE ET PROCEDES DE SYNTHESE ET D'UTILISATION CORRESPONDANTS