The reaction of 2-acylamino-4,5-dihydro-3-furancarbonitriles 1 with sodiumiodide in N,N-dimethyl-formamide gave the corresponding 1-acyl-2-oxo-3-pyrrolidinecarbonitriles 2 in good yields. Successive treatment of 1 with titanium(IV) chloride and potassium carbonate resulted in the formation of N-acyl-1-cyanocyclopropanecarboxamides 4. The same compounds 2 were also obtained by treatment of 4 with sodium
Synthesis of α-diaminomethylenebutyrolactams by the reaction of α-cyanobutyrolactams with<i>n</i>-trimethylsilylamines
作者:Fumi Okabe、Syouhei Nakamura、Kenji Yamagata
DOI:10.1002/jhet.5570440137
日期:2007.1
Successive treatment of α-cyanobutyrolactams 1 with N-trimethylsilylamines and water gave the corresponding α-diaminomethylenebutyrolacatms 2 in good yields. In the NOESY spectra of 2, the E isomer, the NOE observed between β-CH2 (butyrolactam) and N-CH2 (morpholine, pyrrolidine) or N-CH3 (dimethylamine) indicated a cis configuration of these groups.