申请人:International Flavors & Fragrances Inc.
公开号:US04107217A1
公开(公告)日:1978-08-15
Described are intermediates, acetals formed in processes for producing novel 2-alkylidene-3-alkynals and 2-alkylidene-3-alkenals which processes comprise reacting an alkyl metallo acetylide with a dialkoxy acetonitrile or a dialkoxy dialkyl acetamide to form an imine salt, hydrolyzing 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.
本文描述了在制备新型2-烷基亚甲基-3-炔醛和2-烷基亚甲基-3-烯醛的过程中形成的中间体、缩醛物。该过程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)首先用烷基亚磷酰胺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形成新型醛、烷基亚甲基炔醛,如果需要,将烷基亚甲基炔醛的三键还原为双键得到相应的烷基亚烯醛,要么(2)首先将二烷氧基烷基亚甲基炔烃还原成1,1-二烷氧基-2-烷基亚甲基-3-烯,然后如有需要,再水解该1,1-二烷氧基-2-烷基亚甲基-3-烯形成所需的2-烷基亚甲基-3-烯醛;或者(b)首先将炔酮还原成1,1-二烷氧基-3-烯-2-酮,然后用烷基亚磷酰胺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,如有需要,然后水解该二烷氧基烷基亚甲基烯烃形成所需的2-烷基亚甲基-3-烯醛。