Asymmetric synthesis of α-trifluoromethyl substituted aminoacids via 3-hydroxy-3-trifluoromethyl-2,5-diketopiperazines
摘要:
The diastereoselective reaction of organometallic compounds (RMgX, R(2)Cd) with in situ generated trifluoromethyl substituted cyclic acyl imines representing homochiral alpha-electrophilic 3,3,3-trifluoroalanine equivalents gives 3-alkyl-3-trifluoromethyl-2,5-diketopiperazines. The corresponding homochiral dipeptide esters are obtained on acidolysis in methanol.
Asymmetric synthesis of α-trifluoromethyl substituted aminoacids via 3-hydroxy-3-trifluoromethyl-2,5-diketopiperazines
摘要:
The diastereoselective reaction of organometallic compounds (RMgX, R(2)Cd) with in situ generated trifluoromethyl substituted cyclic acyl imines representing homochiral alpha-electrophilic 3,3,3-trifluoroalanine equivalents gives 3-alkyl-3-trifluoromethyl-2,5-diketopiperazines. The corresponding homochiral dipeptide esters are obtained on acidolysis in methanol.