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Asymmetric Catalytic Access to Piperazin-2-ones and Morpholin-2-ones in a One-Pot Approach: Rapid Synthesis of an Intermediate to Aprepitant
被引:9
作者:
Meninno, Sara
[1
]
Lattanzi, Alessandra
[1
]
机构:
[1] Univ Salerno, Dipartimento Chim & Biol A Zambelli, I-84084 Fisciano, Italy
关键词:
RING-OPENING-CYCLIZATION;
ENANTIOSELECTIVE SYNTHESIS;
ORGANOCATALYTIC SYNTHESIS;
ACTIVATED AZIRIDINES;
RECEPTOR ANTAGONIST;
PIPERAZINONE RINGS;
EPOXIDATION;
PSEUDOTHEONAMIDES;
2-OXOPIPERAZINES;
DERIVATIVES;
D O I:
10.1021/acs.joc.2c02491
中图分类号:
O62 [有机化学];
学科分类号:
070303 ;
081704 ;
摘要:
A one-pot Knoevenagel reaction/asymmetric epoxidation/domino ring-opening cyclization (DROC) has been developed from commercial aldehydes, (phenylsulfonyl)acetonitrile, cumyl hydroperoxide, 1,2-ethylendiamines, and 1,2 ethanol amines to provide 3-aryl/alkyl piperazin-2-ones and morpholin-2-ones in yields of 38 to 90% and up to 99% ee. Two out of the three steps are stereoselectively catalyzed by a quinine derived urea. The sequence has been applied for a short enantioselective entry to a key intermediate, in both absolute configurations, involved in the synthesis of the potent antiemetic drug Aprepitant.
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页码:7888 / 7892
页数:5
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