Enantioselective Synthesis of H-Phosphinic Acids Bearing Natural Amino Acid Residues
摘要:
The first systematic study on the asymmetric synthesis of H-phosphinic acids bearing natural protein amino acid residues was reported on the basis of the asymmetric addition of ethyl diethoxymethylphosphinate to N-tert-butane-sulfinyl imines. Good yields and moderate to high enantiose-lectivities were obtained. Reliable methods were developed for the elucidation of the stereochemistry of these phosphinic acids and derivatives thereof. The transformation of the side chains of these analogues was studied. Methods for the conversion of the alpha-aminophosphinates to oligopetides were reported.
结束对氮杂辛类的研究:我们开发了一种新的六步法,用于快速和对映选择性合成吲哚里西啶、吡咯并[1,2- a ]氮杂和吡咯并[1,2- a ]氮杂双环系统及其各自的内酰胺同系物,它们存在于许多天然产品和药物制剂中。该方案能够从商业材料中以 16.4% 的总产率对 (+)-大地碱 D 进行简明的对映选择性全合成(参见方案)。
Gold-Catalyzed Addition–<i>N</i>-Boc Cleavage–Cyclization of <i>N</i>,<i>O</i>-Acetal with Ynamides for Construction of 6-(<i>tert</i>-Butyldimethylsilyl)oxy-tetrahydropyrrolo[1,2-<i>c</i>][1,3]oxazin-1-ones
A highly efficient gold-catalyzed approach between N,Oacetals and ynamides for the construction of 6-(tert-butyldimethylsilyl)oxytetrahydropyrrolo[1,2-c][1,3]oxazin-1-ones was developed. This reaction tolerated a wide range of substituted N,O-acetals and TsN-substituted ynamides, leading to novel heterocycles in moderate to good yields and with excellent diastereoselectivities (dr > 99:1).