Concise and stereoselective synthesis of 2,5- and 2,4-disubstituted thiazole amino acid subunits for synthesizing thiazole-containing peptides
作者:Takuji Magata、Yoshimi Hirokawa、Yusuke Moriguchi、Ryosuke Yokoi、Shotaro Nojiri、Ryota Miyazaki、Sayuri Akasako、Rina Takahashi、Munetaka Nishida、Junya Hakoda、Ryota Nakayama、Aya Tanaka、Naoyoshi Maezaki
DOI:10.1016/j.tetlet.2019.01.054
日期:2019.3
A concise, highly stereoselective synthesis of 2,4- and 2,5-disubstituted thiazole amino acids was developed. These are important building blocks for various biologically active thiazole-containing natural peptides and their regioisomeric analogues. The fundamental reactions are diastereoselective addition of (4- or 5-bromothiazol-2-yl)lithium to N-tert-butanesulfinyl imine with subsequent Pd-catalyzed
开发了简洁,高度立体选择性的2,4-和2,5-二取代噻唑氨基酸的合成方法。这些是各种具有生物活性的含噻唑的天然肽及其区域异构体类似物的重要组成部分。的基本反应是非对映选择性加成的(4-或5-溴噻唑-2-基)锂与ñ -叔-butanesulfinyl亚胺,随后Pd催化的phenoxycarbonylation。