New nitrogen- and sulfur-containing derivatives of chlorocyclopentenones
摘要:
Reactions of 2,3,5-trichloro-4,4-ethylenedioxy- and 2,3,5-trichloro-5-(1,1-dimethylprop-2-en-1-yl)-4,4-dimethoxycyclopent-2-en-1-ones with amino acids gave products of Ad(N)E substitution at the C-3 atom, the corresponding vinylogous amides. Sodium carbamodithioates generated in situ from amines, carbon disulfide, and sodium hydride in tetrahydrofuran reacted with di- and trichlorocyclopentenones in a similar way. Cyanosilylation of 2,3,5-trichloro-4,4-ethylenedioxyyclopent-2-en-1-one with trimethylsilyl cyanide smoothly occurred in toluene at 25 degrees C in the presence of glycine as catalyst.