Asymmetric synthesis of γ-chloro-α,β-diamino- and β,γ-aziridino-α-aminoacylpyrrolidines and -piperidines via stereoselective Mannich-type additions of N-(diphenylmethylene)glycinamides across α-chloro-N-sulfinylimines.

Asymmetric synthesis of γ-chloro-α,β-diamino- and β,γ-aziridino-α-aminoacylpyrrolidines and -piperidines via stereoselective Mannich-type additions of N-(diphenylmethylene)glycinamides across α-chloro-N-sulfinylimines.
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DOI:
10.3762/bjoc.8.239
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发表时间:
2012
影响因子:
2.7
通讯作者:
De Kimpe N
De Kimpe N
中科院分区:
化学4区
文献类型:
--
作者:
Callebaut G;Mangelinckx S;Van der Veken P;Törnroos KW;Augustyns K;De Kimpe N

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通过N-(二苯基亚甲基)甘氨酰胺与手性α-氯-N-对甲苯亚磺酰醛亚胺的高非对映选择性Mannich反应,不对称合成了新的手性γ-氯-α,β-二氨基甲酰胺衍生物。所得的(SS,2S,3S)-γ-氯-α,β-二氨基羧酰胺与通过类似的N-(二苯基亚甲基)甘氨酸酯对手性α-氯-N-对甲苯亚磺酰醛亚胺的Mannich型加成得到的(SS,2 R,3R)-γ-氯-α,β-二氨基羧酯相比,具有相反的对映体选择性。优化了γ-氯-α,β-二氨基甲酰胺在不同酸性条件下的选择性脱保护和关环反应,得到Nα-脱保护的顺式-γ-氯-α,β-二氨基甲酰胺、N-亚磺酰基-β,γ-氮杂环丙烷基-α-氨基甲酰胺衍生物、反式-咪唑烷和Nα,Nβ-脱保护的顺式-γ-氯-α,β-二氨基甲酰胺。
The asymmetric synthesis of new chiral γ-chloro-α,β-diaminocarboxylamide derivatives by highly diastereoselective Mannich-type reactions of N-(diphenylmethylene)glycinamides across chiral α-chloro-N-p-toluenesulfinylaldimines was developed. The resulting (SS,2S,3S)-γ-chloro-α,β-diaminocarboxylamides were formed with the opposite enantiotopic face selectivity as compared to the (SS,2R,3R)-γ-chloro-α,β-diaminocarboxyl esters obtained via Mannich-type addition of analogous N-(diphenylmethylene)glycine esters across a chiral α-chloro-N-p-toluenesulfinylaldimine. Selective deprotection under different acidic reaction conditions and ring closure of the γ-chloro-α,β-diaminocarboxylamides was optimized, which resulted in Nα-deprotected syn-γ-chloro-α,β-diaminocarboxylamides, N-sulfinyl-β,γ-aziridino-α-aminocarboxylamide derivatives, a trans-imidazolidine, and an Nα,Nβ-deprotected syn-γ-chloro-α,β-diaminocarboxylamide.
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影响因子: 2.1
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发表时间: 2006-07-06
期刊: ORGANIC LETTERS
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DOI: 10.1021/jo00309a023
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影响因子: 3.6
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DOI: 10.1039/c2ob06637h
发表时间: 2012-01-01
影响因子: 3.2
作者:
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通讯作者: De Kimpe, Norbert