| 中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 | 
|---|---|---|---|---|
| —— | 3-chloro-L-tyrosine methyl ester | 782440-99-7 | C10H12ClNO3 | 229.663 | 
A novel highly enantioselective two step access to a unit B precursor of cryptophycins in good yields from commercially available starting materials has been developed. The key step is an asymmetric hydrogenation using the commercially available [(COD)Rh-(