Processes for producing novel 2-alkylidene-3-alkynals and 2-alkylidene-3-alkenals which comprise reacting an alkyl metallo acetylide with a dialkoxy acetonitrile or a dialkoxy dialkyl acetamide to form an imine salt, hydrolyzying the imine salt to form a 1,1-dialkoxy-3-alkyn-2-one, alternatively (a) first treating the alkynone with an alkylidene tri-substituted phosphorane or an alkylidene phosphorous triamide or an alkyl phosphoramide anionic compound to provide a dialkoxy alkylidene alkyne, and then either (1) hydrolyzing the dialkoxy alkylidene alkyne to form a novel aldehyde, an alkylidene alkynal, and if desired, reducing the triple bond of the alkylidene alkynal to a double bond to obtain the corresponding alkylidene alkenal or (2) first reducing the dialkoxy alkylidene alkyne to form a 1,1-dialkoxy-2-alkylidene-3-alkene and if desired then hydrolyzing said 1,1-dialkoxy-2-alkylidene-3-alkene to form the desired 2-alkylidene-3-alkenal; or (b) first reducing the alkynone to form a 1,1-dialkoxy-3-alken-2-one and then treating the 1,1-dialkoxy-3-alken-2-one with an alkylidene tri-substituted phosphorane or an alkylidene phosphorous triamide or an alkyl phosphoramide anionic compound to provide a dialkoxy alkylidene alkene and, if desired, then hydrolyzing said dialkoxy alkylidene alkene to form the desired 2-alkylidene-3-alkenal; together with novel alkylidene alkynals and acetals thereof so produced.
生产新型2-烷基亚甲基-3-炔醛和2-烷基亚甲基-3-烯醛的方法包括将烷基
金属
乙炔基与二烷氧基
乙腈或二烷氧基二烷基乙酰胺反应形成
亚胺盐,
水解
亚胺盐形成1,1-二烷氧基-3-炔基-2-酮,或者(a)首先用烷基
亚磷酸三取代物或烷基
磷酸三酰胺或烷基
磷酰胺阴离子化合物处理炔酮以提供二烷氧基烷基亚甲基
炔烃,然后要么(1)
水解二烷氧基烷基亚甲基
炔烃以形成新型醛、烷基亚甲基炔醛,并根据需要将烷基亚甲基炔醛的三键还原为双键以获得相应的烷基亚烯醛,要么(2)首先将二烷氧基烷基亚甲基
炔烃还原为1,1-二烷氧基-2-烷基亚甲基-3-烯,然后如果需要,
水解所述的1,1-二烷氧基-2-烷基亚甲基-3-烯以形成所需的2-烷基亚甲基-3-烯醛;或者(b)首先将炔酮还原为1,1-二烷氧基-3-烯-2-酮,然后用烷基
亚磷酸三取代物或烷基
磷酸三酰胺或烷基
磷酰胺阴离子化合物处理1,1-二烷氧基-3-烯-2-酮以提供二烷氧基烷基亚甲基烯烃,并且如果需要,然后
水解所述的二烷氧基烷基亚甲基烯烃以形成所需的2-烷基亚甲基-3-烯醛;以及由此生产的新型烷基亚甲基炔醛和其
缩醛。