PROCESS FOR PREPARING A 5-ALKEN-1-YNE COMPOUND, (6Z)-1,1-DIALKOXY-6-NONEN-2-YNE COMPOUND, (2E,6Z)-2,6-NONADIENAL AND (2E)-CIS-6,7-EPOXY-2-NONENAL, AND 1,1-DIALKOXY-6-NONEN-2-YNE COMPOUND
Process for preparing a 5-alken-1-yne compound, (6Z)-1,1-dialkoxy-6-nonen-2-yne compound, (2E,6Z)-2,6-nonadienal and (2E)-cis-6,7-epoxy-2-nonenal, and 1,1-dialkoxy-6-nonen-2-yne compound
申请人:SHIN-ETSU CHEMICAL CO., LTD.
公开号:US10781146B2
公开(公告)日:2020-09-22
The object of the present invention is to provide a process for preparing a 5-alken-1-yne compound efficiently at low costs and a process for preparing (2E,6Z)-2,6-nonadienal by making use of the aforesaid process for preparing the 5-alken-1-yne compound.
There is provided a process for preparing a 5-alken-1-yne compound of the following formula (4): Y—Z—CR1═CR2—(CH2)2—C≡CH (4) in which Y in formula (4) represents a hydrogen atom or a hydroxyl group, the process comprising at least steps of: subjecting (i) an alkenylmagnesium halide compound prepared from a haloalkene compound of the following formula (1): Y—Z—CR1═CR2—(CH2)2—X1 (1) and (ii) an alkyne compound of the following formula (2): X2—C≡C—Si(R3)(R4)(R5) (2) to a coupling reaction to form a silane compound of the following formula (3): Y—Z—CR1═CR2—(CH2)2—C≡C—Si(R3)(R4)(R5) (3); and subjecting the silane compound (3) to a desilylation reaction to form the 5-alken-1-yne compound (4).
Synthesis of ?-silyloxyacylcyclopropanes catalyzed by zinc salts and the homoallylic rearrangement of cyclopropylcarbinols by the action of trimethylsilyl halides
作者:N. M. Ivanova、B. A. Cheskis、A. M. Moiseenkov、O. M. Nefedov
DOI:10.1007/bf00963040
日期:1990.1
Simple synthesis of?-silyloxyacylcyclopropanes and the homoallyl rearrangement of cyclopropylcarbinols by the action of trimethylsilyl halides in the presence of zinc halides
作者:B. A. Cheskis、N. M. Ivanova、A. M. Moiseenkov、O. M. Nefedov
DOI:10.1007/bf00958248
日期:1990.9
The ZnCl2 catalyzed condensation of 1-trimethylsilyloxyvinylcyclopropane with aldehydes and ketones gave beta-silyloxyacylcyclopropanes, which were converted by the action of TsOH in boiling benzene into 1-cyclopropyl-2E-alken-1-ones. Reduction of the latter gave saturated and allyl cyclopropylcarbinols, which by means of Me3SiX and catalytic amounts of ZnX2 (X = Cl, Br) were highly selectively converted into the corresponding linear mono- and dienic E-homoallyl halides. The sequence of reactions that was worked out provided an effective synthesis of 3E-dodecenyl acetate, a sex pheromone of the sugar beet moth.
Ishihara, Toshinobu; Yamamoto, Akira, Agricultural and Biological Chemistry, 1984, vol. 48, # 1, p. 211 - 214
作者:Ishihara, Toshinobu、Yamamoto, Akira
DOI:——
日期:——
IVANOVA, N. M.;CHEEKIS, B. A.;MOISEENKO, A. M.;NEFEDOV, O. M., IZV. AN CCCP. CEP. XIM.,(1990) N, S. 225-236
作者:IVANOVA, N. M.、CHEEKIS, B. A.、MOISEENKO, A. M.、NEFEDOV, O. M.