Compound, Manufacturing Method Therefor, and Method for Manufacturing Optically Active alpha-Aminophosphonate Derivative
申请人:MICROBIAL CHEMISTRY RESEARCH FOUNDATION
公开号:US20160145278A1
公开(公告)日:2016-05-26
A method for producing a compound represented by General Formula (1), the method including:
reacting a compound represented by General Formula (3) and a compound represented by General Formula (4):
where R
1
and R
2
each represent aliphatic group which may have substituent, or aromatic group which may have substituent (with the proviso that R
1
and R
2
are different groups), R
3
represents aromatic group which may have substituent, and R
4
represents aliphatic group which may have substituent, or aromatic group which may have substituent,
where R
1
and R
2
each represent aliphatic group which may have substituent, or aromatic group which may have substituent (with the proviso that R
1
and R
2
are different groups), and R
3
represents aromatic group which may have substituent,
where R
4
represents aliphatic group which may have substituent, or aromatic group which may have substituent.
N-diethoxythiophosphorylimines 1 and N-diphenylthiophosphinoylimines 2 exhibited good reactivity in the aza-Henryreaction. The corresponding products were obtained in excellent chemical yields under mild conditions. Moreover, the asymmetric version of the N-thiophosphoryl imine 1-based aza-Henryreaction was also realized with ee values up to 87% by employing Takemoto’s thiourea as the catalyst.
Direct Catalytic Asymmetric Mannich-Type Reaction of Benzyl Isocyanide: Stereoselective Synthesis of 1,2-Diarylethylenediamines
作者:Keiji Tamura、Naoya Kumagai、Masakatsu Shibasaki
DOI:10.1002/ejoc.201500336
日期:2015.5
A directcatalyticasymmetricMannich-typereaction of benzyl isocyanide using a CuI catalyst and N-(diphenylthiophosphinoyl)imines was developed. The simultaneous activation strategy by soft–soft interaction was the key to promote the reaction using a weakly acidic pronucleophile, benzyl isocyanide. The spontaneous cyclization of the Mannich adduct afforded the corresponding enantioenriched imidazolines
开发了使用 CuI 催化剂和 N-(二苯基硫代膦酰基) 亚胺的苄基异氰化物的直接催化不对称曼尼希型反应。通过软-软相互作用的同时激活策略是使用弱酸性亲核试剂苄基异氰化物促进反应的关键。曼尼希加合物的自发环化得到相应的对映体富集的咪唑啉,它可能是各种 1,2-二芳基乙二胺的前体。
Direct Catalytic Asymmetric Alkynylation of Ketoimines
An efficient protocol for direct catalytic alkynylation of ketoimines is described. The simultaneous activation of a soft Lewis basic terminal alkyne and a ketoimine bearing a thiophosphinoyl group by soft Lewis acid Cu(I) is crucial for high conversion. The reaction can be rendered asymmetric with a chiral bisphosphine ligand (S,S)-Ph-BPE.