Synthesis and stereochemical assignments of diastereomeric Ni(II) complexes of glycine Schiff base with (R)-2-(N-{2-[N-alkyl-N-(1-phenylethyl)-amino]acetyl}amino) benzophenone; a case of configurationally stable stereogenic nitrogen

被引:10
作者
Moriwaki, Hiroki [1 ,2 ]
Resch, Daniel [1 ]
Li, Hengguang [1 ]
Ojima, Iwao [1 ]
Takeda, Ryosuke [2 ]
Luis Acena, Jose [3 ]
Soloshonok, Vadim A. [3 ,4 ]
机构
[1] SUNY Stony Brook, Dept Chem, Inst Chem Biol & Drug Discovery, Stony Brook, NY 11794 USA
[2] Hamari Chem Ltd, Higashi Yodogawa Ku, Osaka 5330024, Japan
[3] Univ Basque Country, Fac Chem, Dept Organ Chem 1, San Sebastian 20018, Spain
[4] Basque Fdn Sci, IKERBASQUE, Bilbao 48011, Spain
基金
美国国家科学基金会;
关键词
amino acids; asymmetric synthesis; Ni(II) complexes; Schiff bases; stereogenic nitrogen; ALPHA-AMINO-ACIDS; MICHAEL ADDITION-REACTIONS; EFFICIENT ASYMMETRIC-SYNTHESIS; SUBSTITUTED PYROGLUTAMIC ACIDS; VIRTUALLY COMPLETE CONTROL; PHASE-TRANSFER CATALYSTS; LARGE-SCALE SYNTHESIS; NUCLEOPHILIC GLYCINE; ALDOL REACTIONS; ENANTIOSELECTIVE SYNTHESIS;
D O I
10.3762/bjoc.10.41
中图分类号
O62 [有机化学];
学科分类号
070303 ; 081704 ;
摘要
A family of chiral ligands derived from alpha-phenylethylamine and 2-aminobenzophenone were prepared by alkylation of the nitrogen atom. Upon reaction with glycine and a Ni(II) salt, these ligands were transformed into diastereomeric complexes, as a result of the configurational stability of the stereogenic nitrogen atom. Different diastereomeric ratios were observed depending on the substituent R introduced in the starting ligand, and stereochemical assignments were based on X-ray analysis, along with NMR studies and optical rotation measurements.
引用
收藏
页码:442 / 448
页数:7
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