Recently, we prepared the first representatives of N-trifluoromethylsulfonyl-substituted Si, N- heterocycles, namely, 4, 4-dimethyl-1-(trifluoromethylsulfonyl)-1, 4-azasilinane (I)[1] and 2, 2, 6, 6-tetramethyl-4-(trifluoromethylsulfonyl)-1, 4, 2, 6-oxaazadisilinane (II)[2]. which they play a decisive role in the so-called “reverse–turn formation” of these compounds [6, 7]. Due to high lipophilicity of the silyl groups, the introduction of silaprolines facilitates the ...
