Cyanoethylation of Trichlorosilane. II. α-Addition
作者:Shunichi Nozakura、Shiro Konotsune
DOI:10.1246/bcsj.29.326
日期:1956.3
Contrary to the case of β-cyanoethylation, α-cyanoethylation of trichlorosilane was found to take place in an autoclave in the presence of either pyridine or platinized asbestos. In the reactions in sealed glass tubes, on the other hand, stainless steel and pyridine, mono- and tetrapyridine nickel chloride, and nickel chloride pyridine hydrochloride complex were effective for the α-addition. An ionic
Homoenolate dianions of secondary amides via tin/lithium exchange
作者:Ramanuj Goswami、Daniel E. Corcoran
DOI:10.1016/s0040-4039(00)87133-6
日期:1982.1
Treatment of N-phenyl- a well as N-methyl-3-(tri-bar|n-butylstannyl)-propionamide with 2 equiv of bar|n-butyllithium in the presence of 1,4-diazabicyclo[2.2.2]octane at −78°C in tetrahydrofuran produced the corresponding dilithio derivatives (homoenolate dianions) 4 and 8 respectively. Reaction with various electrophiles (1 equiv) gave the terminally substituted amides in good yields.
N-苯基-一个以及N-甲基-3-治疗(三-巴| N -butylstannyl) -丙酰胺与2当量的巴| N丁基锂在1,4-二氮杂双环的存在[2.2.2]辛烷在-78℃下,在四氢呋喃中分别产生相应的二硫代衍生物(同烯酸二阴离子)4和8。与各种亲电试剂(1当量)的反应以良好的收率得到了末端取代的酰胺。
NISHIYAMA, HISAO;SAKUTA, KOJI;OSAKA, NORIYUKI;ARAI, HIROYUKI;MATSUMOTO, M+, TETRAHEDRON, 44,(1988) N, C. 2413-2426
selective fragmentation reactions of β-trimethylsilylketoximes have been proved to proceed effectively with acid catalysts giving the corresponding nitriles. Cyclic silylketoximes gave unsaturated nitriles. The fragmentation in the Beckmann rearrangement is completely controlled and directed by a trimethylsilyl group to lead the regio- and stereo-specific formation of the double bond. The catalytic fragmentation