Optical Resolution by Preferential Crystallization of (<i>RS</i>)-2-Amino-3-(2-carboxyethylthio)propanoic Acid
作者:Tadashi SHIRAIWA、Motoki KUBO、Mitsuhiro WATANABE、Hidemasa NAKATANI、Masanori OHKUBO、Hidemoto KUROKAWA
DOI:10.1271/bbb.62.818
日期:1998.1
Electrophilic additions of DL- and L-Cys to propenoic acid afforded (RS)- and (R)-2-amino-3-(2-carboxyethylthio)propanoic acids [(RS)- and (R)-ACE], respectively. (RS)-ACE was found to exist as a conglomerate based on its melting point, solubility, and infrared spectrum. (RS)-ACE was optically resolved by preferential crystallization to yield (R)- and (S)-ACE. The obtained (R)- and (S)-ACE were efficiently
DL-和L-Cys的亲电子加成到丙酸中,分别得到(RS)-和(R)-2-氨基-3-(2-羧乙硫基)丙酸[(RS)-和(R)-ACE]。基于其熔点,溶解度和红外光谱,发现(RS)-ACE以团块形式存在。通过优先结晶将(RS)-ACE光学拆分,得到(R)-和(S)-ACE。考虑到(RS)-ACE的溶解度,将获得的(R)-和(S)-ACE从水中有效地重结晶,从而得到光学纯的形式。