DIASTEREOSELECTIVE LITHIATION OF N-SILYL-PROTECTED (S)-TETRAHYDRO-1H-PYRROLO[1,2-c]IMIDAZOL-3(2H)-ONE

被引:3
|
作者
Metallinos, Costa [1 ]
Sadraei, Seyed Iraj [1 ]
Zhukovskaya, Nadezda [1 ]
机构
[1] Brock Univ, Dept Chem, St Catharines, ON L2S 3A1, Canada
基金
加拿大自然科学与工程研究理事会;
关键词
Proline Hydantoin; Diastereoselective Reaction; Lithiation; Triethylsilyl Protecting Group; Pyrroloimidazolinone; CATALYZED ALPHA-ARYLATION; DYNAMIC THERMODYNAMIC RESOLUTION; ASYMMETRIC DEPROTONATION; BOC-PYRROLIDINE; ENANTIOSELECTIVE SYNTHESES; PRODUCT STEREOSPECIFICITY; ENANTIOMERIZATION; STEREOSELECTIVITY; SUBSTITUTION; CYCLIZATION;
D O I
10.3987/COM-13-S(S)29
中图分类号
O62 [有机化学];
学科分类号
070303 ; 081704 ;
摘要
An L-proline-derived imidazolone protected with an N-triethylsilyl (N-TES) group undergoes diastereoselective lithiation-electrophile quench to give C5-substituted products with syn stereochemistry. Unlike the previous N-t-Bu analogues, the N-TES derivatives may be easily N-desilylated to give secondary ureas that serve as precursors to N-phenyl chiral bicyclic guanidines.
引用
收藏
页码:347 / 362
页数:16
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