Reactions of ?-halo-?, ?-unsaturated aldehydes with secondary amines
作者:A. Yu. Raley、N. A. Keiko、M. G. Poronkov
DOI:10.1007/bf01433745
日期:1996.1
Reactions of 2-halo-2-alkenals R″(R′)C=CX-CHO with secondaryamines R2NH occur asipso-substitution of the halogen atom, along with fragmentation and condensation, yielding 1,2-diaminoethenes R2NCH=CHNR2, carbonyl compounds R″C(O)R′, 1,3-bis(amino)-2-haloolefins R″(R′)C(NR2)CX=CHNR2, and formamides R2NCHO. The ratio between the competing reactions depends on the structure of the starting compounds and
作者:Guo-qiang Shi、Sylvain Cottens、Sayed Ahmed Shiba、Schlosser Manfred
DOI:10.1016/s0040-4020(01)88354-x
日期:1992.11
The readily accessible 2-halogeno-1-trimethylsilyloxy-1,3-butadienes react smoothly with dimethyl acetylenedicarboxylate to afford 4-halophthalic esters. One of these cycloadducts was subsequently converted into heterocyclic analogues of phantolide like musk fragrances.