e.g. Filippa Pettersson or Cancer Res. 75(6) , 1102-12, (2015) or 10.1002/anie.201600521
The Journal of Organic Chemistry
New convenient synthesis of. beta.,. beta.-difluoro amines and. beta.,. beta.-difluoro-. alpha.-amino acid alkyl esters by the addition of hydrogen fluoride on 1-azirines
TN Wade, R Kheribet
Index: Wade, Tamsir N.; Kheribet, Rabia Journal of Organic Chemistry, 1980 , vol. 45, # 26 p. 5333 - 5335