Chemoselective Reactions of Amidines: Selective Formation of Iminopyrimidine Regioisomers
作者:John A. McCauley、Cory R. Theberge、Nigel J. Liverton
DOI:10.1021/ol006499j
日期:2000.10.1
[GRAPHICS]The dramatic effect of base on the chemoselectivity of the reaction of amidines with substituted 3-phenyl-2-propynylnitriles is demonstrated. Amidine 1 can be added to cyanoalkyne 2 to give iminopyrimidine isomer 3 with high selectivity. The addition of 2 equiv of NaHMDS completely reverses the selectivity of the reaction, yielding isomer 4 almost exclusively. This method has been used to prepare a variety of substituted 4-iminopyrimidines.
LANGLOIS, M.;GUILLONNEAU, C.;VOVAN, TRI;MEINGAN, J. -P.;MAILLARD, J., J. HETEROCYCL. CHEM., 1982, 19, N 1, 193-200
作者:LANGLOIS, M.、GUILLONNEAU, C.、VOVAN, TRI、MEINGAN, J. -P.、MAILLARD, J.
DOI:——
日期:——
LANGLOIS, M.;GUILLONEAU, C.;VO, VAN, TRI;JOLLY, R.;MAILLARD, J., J. HETEROCYCL. CHEM., 1983, 20, N 2, 393-398
作者:LANGLOIS, M.、GUILLONEAU, C.、VO, VAN, TRI、JOLLY, R.、MAILLARD, J.
DOI:——
日期:——
LANGLOIS M.; GUILLONNEAU C.; TRI VO VAN; MAILLARD J.; LANNOY J.; NGUYEN H+, EUR. J. MED. CHEM., 1978, 13, NO 2, 161-169
作者:LANGLOIS M.、 GUILLONNEAU C.、 TRI VO VAN、 MAILLARD J.、 LANNOY J.、 NGUYEN H+