... proceeded to give the good yields of the products 6b–e (Table 3, entries 3–6). These chemical yields were ... 2 : 1, v/v) did not proceed effectively (Table 4, entry 2). In the absence of organic cosolvent, the ... ii) H 2 , Pd(OH) 2 /C, CSA, MeOH, 20 °C; iii) CbzCl, Na 2 CO 3 , acetone–H ...