1429442-40-9Relevant academic research and scientific papers
PROCESS FOR MAKING N-SULFINYL a-AMINO AMIDES
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Page/Page column 13; 22, (2014/06/11)
Disclosed is a process for making diastereomeric N-sulfinyl α-amino amides by reaction of chiral sulfinimines with formamides and lithium diisopropylamide. The process of the invention provides the N-sulfinyl α-amino amides in high yields and with high diastereoselectivity.
Carbamoyl anion addition to N -sulfinyl imines: Highly diastereoselective synthesis of α-amino amides
Reeves, Jonathan T.,Tan, Zhulin,Herbage, Melissa A.,Han, Zhengxu S.,Marsini, Maurice A.,Li, Zhibin,Li, Guisheng,Xu, Yibo,Fandrick, Keith R.,Gonnella, Nina C.,Campbell, Scot,Ma, Shengli,Grinberg, Nelu,Lee, Heewon,Lu, Bruce Z.,Senanayake, Chris H.
supporting information, p. 5565 - 5568 (2013/05/22)
Carbamoyl anions, generated from N,N-disubstituted formamides and lithium diisopropylamide, add with high diastereoselectivity to chiral N-sulfinyl aldimines and ketimines to provide α-amino amides. The methodology enables the direct introduction of a carbonyl group without the requirement of unmasking steps as with other nucleophiles. The products may be converted to α-amino esters or 1,2-diamines. Iterative application of the reaction enabled the stereoselective synthesis of a dipeptide. Spectroscopic and computational studies support an anion structure with η2 coordination of lithium by the carbonyl group.
