Angiotensin-II Analogues. I: Synthesis and incorporation of the halogenated amino acids 3-(4?-iodophenyl)alanine, 3-(3?,5?-dibromo-4?-chlorophenyl)alanine, 3-(3?,4?,5?-tribromophenyl)alanine, and 3-(2?,3?,4?,5?,6?-pentabromophenyl)alanine
作者:Richard Leduc、Michel Bernier、Emanuel Escher
DOI:10.1002/hlca.19830660329
日期:1983.5.5
The synthesis of the polyhalogenated phenylalanines Phe(3′,4′,5′-Br3) (3), Phe(3′,5′-Br2-4′-Cl) (4) and DL-Phe (2′,3′,4′,5′,6′-Br5) (9) is described. The trihalogenated phenylalanines 3 and 4 are obtained stereospecifically from Phe(4′-NH2) by electrophilic bromination followed by Sandmeyer reaction. The most hydrophobic amino acid 9 is synthesized from pentabromobenzyl bromide and a glycine analogue
多卤代苯丙氨酸Phe(3',4',5'-Br 3)(3),Phe(3',5'-Br 2 -4'-Cl)(4)和DL-Phe(2' ,(3',4',5',6'-Br 5)(9)被描述。通过亲电溴化然后进行桑德迈尔反应,从Phe(4'-NH 2)立体有择地获得三卤代苯丙氨酸3和4。最疏水的氨基酸9是由五溴苄基溴和甘氨酸类似物通过相转移催化合成的。与氨基酸4,9,苯丙氨酸(4'- I)和d-PHE,[1-肌氨酸]血管紧张素II类似物([肌氨酸产生1 [AT]用于结构活性研究和掺入tri。通过HPLC分离非对映异构五溴肽L-和D- 13。并通过催化脱卤和与[Sar 1 ] AT(10)和[Sar 1,D-Phe 8 ] AT(14)的比较进行鉴定。