Synthesis of 1,2-amino alcohols
Acyloxymethyl radicals, that add to imines, were generated from the corresponding iodomethyl esters by the action of dimethylzinc or triethylborane. A facile hydrolysis of the acyloxy moiety of the adducts gave the corresponding amino alcohols in good yield.
K.-i. Yamada, M. Nakano, M. Maekawa, T. Akindele, K. Tomioka, Org. Lett., 2008, 10, 3805-3808.
N-Benzyldiphenylphosphinamides are deprotonated at the NCα position diastereospecifically upon treatment with t-BuLi in diethyl ether at low temperature. Reaction of the anions with various electrophiles and subsequent cleavage of the P-N linkage affords 1,2-amino alcohols and α-, β-, and γ-amino acids.
P. O. Burgos, I. Fernández, M. J. Iglesias, S. García-Granda, F. L. Ortiz, Org. Lett., 2008, 10, 537-540.
A highly efficient, mild and practical approach for the synthesis of optically pure β-amino alcohols by the SmI2-induced reductive cross-coupling of various chiral N-tert-butanesulfinyl imines with aldehydes was developed.
Y.-W. Zhong, Y.-Z. Dong, K. Fang, K. Izumi, M.-H. Xu, G.-Q. Lin, J. Am. Chem. Soc., 2005, 127, 11956-11957.