New Crystalline N-(Coumarin-4-yl)-L-pyroglutamic Acid. The First Synthesis and Application to 1H NMR Optical Purity Determination of Alcohols and Amines
作者:Kazuo Nagasawa、Ritsuko Okazaki、Asami Yamashita、Keiichi Ito、Kohji Wada
DOI:10.3987/com-97-7775
日期:——
Condensation of 3-phenylsulfonyl-4-chlorocoumarin with tert-butyl L-pyroglutamate potassium salt followed by desulfonylation and ester-cleavage yielded the novel crystalline N-(coumarin-4-yl)-L-pyro-glutamic acid[CPYR0-0H], which being evidenced to be a versatile and reliable H-1 nmr optical purity determination agent for chiral alcohols and amines.