N-Hydroxy-5-norbornene-2, 3-dicarboximide (HONB) was found to be an excellent reagent to be used in couple with N, N'-dicyclohexylcarbodiimide (DCC) for the peptide synthesis. Various racemization tests by the use of this reagent were conducted to see the degree of racemization during the peptide synthesis. The newly employed reagent (HONB) decreases racemization, prohibits formation of N-acylurea and affords peptides in excellent yields and a high state of purity. To evaluate this new reagent, luteinizing hormone releasing hormone (LH-RH) was prepared by the new active ester method.
研究发现,N-羟基-5-
降冰片烯-2,3-二甲
酰亚胺(HONB)与 N,N'-二环己基碳二
亚胺(
DCC)配合使用,是合成
多肽的极佳试剂。使用该试剂进行了各种消旋化测试,以了解肽合成过程中的消旋化程度。新使用的试剂(HONB)降低了消旋化程度,阻止了 N-酰基
脲的形成,并以极高的产量和纯度合成了
多肽。为了评估这种新试剂,我们采用新的活性酯法制备了促
黄体生成素释放激素(LH-RH)。