135968-96-6Relevant articles and documents
Diastereoselective Synthesis of Adjacent P,C-Stereogenic β-N-Glycosidic Linked α-Aminophosphinates
Liu, Shuang,Li, Yuming,Yin, Zhiyu,Yu, Qiuli,Miao, Zhiwei
, p. 2481 - 2488 (2017/03/14)
The diastereoselective formation of adjacent P,C-stereogenic β-N-glycosidic linked α-aminophosphinates is developed in high yields via a phospha-Mannich reaction. The reaction was performed by employing (Rp)-O-(?)-menthyl H-phenylphosphinate and O-pivaloylated N-galactosylimine for double stereodifferentiation and BF3·Et2O as a promoter in THF. O-Pivaloylated N-galactosylphenyl imine 2 and (Rp)-O-(?)-menthyl H-phenylphosphinate 1 were converted to N-galactosyl α-aminoalkylphosphinate 3 with ratios of diastereomers up to 20:1. The synthetic method of the conversion provides a rapid access to adjacent P,C-stereogenic chiral α-aminophosphinates.
Stereoselective synthesis of α-amino(phenyl)methyl(phenyl)phosphinic acids with O-pivaloylated D-galactoslamine as chiral auxiliary
Wang, Yadan,Wang, Yangyun,Yu, Jipan,Miao, Zhiwei,Chen, Ruyu
supporting information; experimental part, p. 9290 - 9293 (2010/04/05)
Stereoselective synthesis of α-amino (phenyl)methyl(phenyl)phosphinic acids with O-pivaloylated D-galactosylamine as chiral auxiliary, was reported. 2 3 drops of acetic acid were added to a solution of amine 1 and aldehyde 2 in 2-propanol and the mixture was stirred at room temperature for about 0.5 h. A solution of N-galactosylaldimines 3 in THF was cooled to 0°C, and phosphinate 4 and SnCl4 were added. The mixture was stirred for 2 d at room temperature. The aqueous phase was extracted with CHCl3 and the organic layers were dried with anhydrous MgSO4, filtered, and concentrated in vacuo to yield the crude products. A solution of compound 5 in dry methanol was treated with freshly prepared solution of HCl. Then methanol was evaporated in vacuo and the remaining residue dissolved in 0.5 M HCl and extracted with pentane. The results revealed that AlCl3, SnCl 4, and BF3.OEt2 were able to promote the addition.
Diastereoselektive Strecker-Synthese von α-Aminonitrilen an Kohlenhydrat-Matrices
Kunz, Horst,Sager, Wilfried
, p. 595 - 597 (2007/10/02)
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