Reactions of Alkyl Methyl Ketoximes with Tetrasulfur Tetranitride Antimony Pentachloride Complex (S4N4ÅESbCl5): A Regioselective Formation of 3-Alkyl-4-methyl-1,2,5-thiadiazoles and Their Mechanism of Formation
摘要:
Treatment of alkyl methyl ketoximes with tetrasulfur tetranitride antimony pentachloride complex ((S4N4SbCl5)-Sb-.) in aromatic solvents such as benzene and toluene at 60 degrees C led to the regioselective formation of 3-alkyl-4-methyl-1,2,5-thiadiazoles in low yields, whereas the reactions of alkyl aryl ketoximes under the same conditions gave exclusively N-arylalkanamides in good yields. A mechanism is proposed for the formation of 3-alkyl-4-methyl-1,2,5-thiadiazoles.
The invention provides novel inhibitors of IAP that are useful as therapeutic agents for treating malignancies where the compounds have the general formula (I), and G, X
1
, X
2
, R
1
, R
2
, R
3
, R
4
, R
4
′, R
5
, R
a
, R
b
, and R
c
are as described herein.
The invention provides novel inhibitors of IAP that are useful as therapeutic agents for treating malignancies where the compounds have the general formula I:
wherein X, Y, A, R
1
, R
2
, R
3
, R
4
, R
4
′, R
5
, R
5
′, R
6
and R
6
′ are as described herein.