Selenium-sulfur analogs.<b>4.</b>Synthesis and characterization of (±)-β-(2-amino-1,3-selenazol-4-yl)alanine
作者:Robert N. Hanson、Michael A. Davis
DOI:10.1002/jhet.5570180141
日期:1981.1
The novel amino acid (±)-β-(2-amino-1,3-selenazol-4-yl)alanine 4a was prepared from selenourea and 1,3-dichloropropan-2-one via a four-step synthetic sequence. Nuclear magnetic resonance analysis indicated a downfield chemical shift of δ 0.29 to 0.30 and δ 0.57 for the C5-proton of the protonated 2-amino-and 2-acetamido-1,3-selenazoles respectively compared with the analogous thiazoles. The infrared
经由四步合成序列,由硒脲和1,3-二氯丙烷-2-酮制备了新型氨基酸(±)-β-(2-氨基-1,3-硒代唑-4-基)丙氨酸4a。核磁共振分析表明,与类似的噻唑相比,质子化的2-氨基-和2-乙酰氨基-1,3-硒唑的C 5-质子的δ0.29到0.30和δ0.57的低场化学位移。硒氮唑和相应的噻唑化合物的红外光谱实际上是相同的。