Gold‐Zinc Co‐Catalyzed Alkynoate Hydrocarboxylation with <i>N</i>‐Protected Amino Acids for Preparation of Storable Acylating Reagents and Racemization‐Free Peptide Synthesis
作者:Ayaka Sakurada、Miyu Sato、Kosuke Higashida、Masaya Sawamura
DOI:10.1002/adsc.202400286
日期:——
5‐a]pyridin‐3‐ylidene to prepare α‐methoxycarbonyl enol esters as acylating reagents. The α‐methoxycarbonyl enol esters were isolable through silica‐gel column chromatography and storable without precautions regarding moisture. Acylation of free amines with the α‐methoxycarbonyl enol esters smoothly proceeded without epimerization of the stereogenic center derived from the enol esters, affording analytically pure dipeptide
2-辛炔酸甲酯是一种低成本的市售化学品,具有 N-保护的氨基酸,采用由 5- 构建的金锌协同催化剂开发。 [(2,2'-联吡啶)-5-基]咪唑并[1,5-a]吡啶-3-亚基酰化制备α-甲氧基羰基烯醇酯试剂。 α-甲氧基羰基烯醇酯可通过硅胶柱色谱法分离,并且可在不采取防潮措施的情况下储存。游离胺与α-甲氧基羰基烯醇酯的酰化顺利进行,而烯醇酯衍生的立体中心没有差向异构化,只需通过过滤和己烷洗涤即可得到分析纯的二肽化合物。