Synthesis of a Derivative of the Peptaibol-Antibiotic Trichovirin I 1B by Means of the‘Azirine/Oxazolone Method’
作者:Roeland T. N. Luykx、Anthony Linden、Heinz Heimgartner
DOI:10.1002/hlca.200390339
日期:2003.12
Aib residues were introduced by the coupling of the corresponding amino or peptide acids with 2,2-dimethyl-2H-azirine-3-(N-methyl-N-phenylamine) (1a) and methyl N-(2,2-dimethyl-2H-azirin-3-yl)-L-prolinate (3a) as the Aib and Aib-Pro synthons, respectively. Single crystals of two segments, i.e., the N-terminal hexapeptide Z-Aib-Asn(Trt)-Leu-Aib-Pro-Ser(tBu)-OMe (23) and the C-terminal octapeptide Z-V
根据Trichovirin I 1B,Z-Ser(t Bu)-Val-Aib-Pro-Aib-Leu-Aib-Pro-Leuol(5)的C端九肽的较早合成方法,完整的四肽Z-Aib -Asn(Trt)-Leu-Aib-Pro-Ser(t Bu)-Val-Aib-Pro-Aib-Leu-Aib-Pro-Leuol(11b)是一种受保护的Trichovirin I 1B,目前已通过以下方法制备“叠氮基/恶唑酮法”。除了N末端Aib(1)以外,所有Aib残基都是通过相应的氨基酸或肽酸与2,2-二甲基-2 H -azirine-3-(N-甲基-N-苯胺)偶联而引入的)(1a)和甲基N-(2,2-二甲基-2 H-Azirin-3-基)-L-脯氨酸盐(3a)分别作为Aib和Aib-Pro合成子。两段,单晶即,N末端六肽Z-AIB-的Asn(TRT)-Leu-AIB -脯氨酸-丝氨酸(吨丁基)-OMe(