The Boc and Bzl protected tyrosine (Boc-Tyr(Bzl)-OH) was allowed to react with proline methyl ester hydrochloride to form the second dipeptide Boc-Tyr(Bzl)-Pro-OMe in 42% yield.

 
  • 选择叔丁氧羰酰基(Boc)和苄基(Bzl)作为酪氨酸的氨基和侧链保护基,与脯氨酸甲酯盐酸盐缩合得二肽片段Boc-Tyr(Bzl)-Pro-OMe,产率42%25。
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