共 50 条
Enantioselective Ammonium Ylide Mediated One-Pot Synthesis of Highly Substitutedγ-Butyrolactones
被引:13
|作者:
Drennhaus, Till
[2
]
Oehler, Laura
[1
]
Djalali, Saveh
[1
]
Hoefmann, Svenja
[1
]
Mueller, Clemens
[1
]
Pietruszka, Joerg
[1
,2
]
Worgull, Dennis
[1
]
机构:
[1] Heinrich Heine Univ Dusseldorf, Forschungszentrum Julich, Inst Bioorgan Chem, Stetternicher Forst, Bldg 15-8, D-52426 Julich, Germany
[2] Forschungszentrum Julich, Inst Bio & Geosci IBG 1, D-52426 Julich, Germany
关键词:
asymmetric synthesis;
asymmetric catalysis;
heterocycles;
lactones;
multicomponent reactions;
ylides;
STEREOSELECTIVE-SYNTHESIS;
ASYMMETRIC-SYNTHESIS;
CINCHONA ALKALOIDS;
DIASTEREOSELECTIVE SYNTHESIS;
FACILE SYNTHESIS;
4+1 ANNULATION;
EFFICIENT;
DERIVATIVES;
CYCLOPROPANATION;
QUATERNARY;
D O I:
10.1002/adsc.202000039
中图分类号:
O69 [应用化学];
学科分类号:
081704 ;
摘要:
An ammonium ylide mediated access towardstrans-beta,gamma-disubstituted,all-trans-alpha,beta,gamma-trisubstituted, and alpha,alpha,beta,gamma-tetrasubstituted gamma-butyrolactones bearing a broad variety of functionalities was developed. Starting from widely accessible benzylidene Meldrum's acid derivatives and alpha-bromo carbonyl compounds,gamma-butyrolactones were obtained in yields between 32-99% with up to excellent diastereoselectivities (>95:5)viaa DABCO-mediated [2+1] annulation. Utilization of enantiomerically pure cinchona alkaloid derivatives enables the first asymmetric ammonium ylide mediated method to provide (3R, 4R)-beta,gamma-disubstituted and (2R, 3R, 4R)-alpha,beta,gamma-trisubstituted gamma-butyrolactones in moderate to good yields with up to very good enantiomeric ratios (97:3). The scalability of the transformation was proven while determining the absolute configuration.
引用
收藏
页码:2385 / 2396
页数:12
相关论文