Synthesis and solid state conformation of phenylalanine mimetics constrained in a proline-like conformation
作者:James Gardiner、Andrew D. Abell
DOI:10.1039/b406450j
日期:——
We present the synthesis of five- and six-membered cyclic phenylalanine mimics (1, 9, 16 and 17) that are constrained in a proline-like conformation. The five-membered mimetic 16 was prepared by Ring Closing Metathesis (RCM) of diene 15, itself prepared by alpha-benzylation of the L-methionine derived oxazolidinone 10, followed by oxidative elimination, ring hydrolysis and N-allylation. The six-membered
我们提出了五元和六元环状苯丙氨酸模拟物(1、9、16、17)的合成,这些模拟物被限制在脯氨酸样构象中。通过二烯15的闭环易位(RCM)来制备五元模拟物16,二烯15本身是通过L-蛋氨酸衍生的恶唑烷酮10的α-苄基化,然后氧化消除,环水解和N-烯丙基化而制备的。通过使L-苯丙氨酸衍生的恶唑烷酮5烯丙基化,然后水解,N-烯丙基化和RCM来制备六元模拟物1。将烯烃1和16催化氢化分别得到9和17。通过X射线晶体学确定9和16的固态结构,并将其构象与1。