Substituted glycidic acid esters, of the formula <;FORM:0372013/IV/1>; where R1 is hydrogen or alkyl, R2 is a cyclic residue when R1 is hydrogen or any organic residue when R1 is alkyl, and X represents a saturated chain, are manufactured by condensing a halogen-acetic acid ester with a cyclic aldehyde or with a ketone in which the carbon atom of the oxo-group is bound to alkyl and to any organic residue or is a member of a saturated ring, by means of an alkali metal, an alkali metal amide or an alkali metal alcoholate, in a medium in which during the condensation process alkali metal halide does not separate on the condensing agent, viz. a liquid hydrocarbon or a liquid halogenated hydrocarbon. The products are converted into substituted acetaldehydes by saponifying with an alkali, acidifying the solution and steam distilling. In examples: (1) benzaldehyde is condensed with chloracetic acid ethyl ester by means of sodium in the presence of xylene yielding phenylglycidic acid ethyl ester, which is converted into phenylacetaldehyde; (2) 4-methoxybenzaldehyde is similarly treated; (3) 4-chlorobenzaldehyde is similarly converted into 4-chlorophenylglycidic acid ethyl ester and 4-chlorophenylacetaldehyde; (4) acetophenone is condensed with chloracetic acid ethyl ester by means of sodium amide in the presence of benzene or xylene, producing b -phenyl-b -methylglycidic acid ethyl ester, which is converted into 1-oxo-2-phenyl-2-methylethane (hydratropa aldehyde); (5) 2-oxo-6 : 10-dimethylundecane (hexahydropseudoionone) and chloracetic acid ethyl ester are condensed by means of sodium in xylene, yielding the corresponding glycidic ester, which is transformed into 1-oxo-2 : 6 : 10-trimethylundecane; (6) decahydro-2-oxonaphthalene (b -decalone) similarly yields the corresponding glycidic acid ester which is converted into decahydro-2-naphthaldehyde; (7) 1 : 1 : 3-trimethyl-2- (23 - oxobutyl)-cyclohexane (tetrahydroionone) is similarly condensed to produce the corresponding glycidic acid ester, which is converted into 1 : 1 : 3-trimethyl-2-(2<;4>; - oxo - 2<;3>; - methobutyl) - cyclohexane. The properties are also given of the substituted glycidic acid esters and substituted acetaldehydes obtained from: 4-methyl- and 4-ethyl-benzaldehyde, 2 : 4-dimethylbenzaldehyde, 4-isopropylbenzaldehyde, 4-(1<;1>;-methopropyl)-benzaldehyde (obtainable by the action of carbon monoxide on 2-phenylbutane in the presence of aluminium chloride), 2 : 4-diisopropylbenzaldehyde, 5 : 6 : 7 : 8-tetrahydro-1-naphthaldehyde (obtainable by the action of carbon monoxide on tetrahydronaphthalene in the presence of aluminium chloride); 2-oxodecane (methyloctylketone), 2-oxoundecane (methylnonylketone), 2-oxo-2-(p-isopropylphenyl)-ethane (p-isopropylacetophenone), 2-oxo-2-(p-methoxyphenyl)-ethane (methyl - p - methoxyphenylketone), 2 - oxo - 4-phenylbutane, 2 - oxo- 4 - (p-isopropylphenyl)-butane, and 1 : 1 : 3-trimethyl-2-(2<;3>;-oxopentyl)-cyclohexane (obtainable by hydrogenating the corresponding a -methylionone). Other starting materials specified are naphthaldehyde and furfural on the one hand and bromacetic acid esters on the other. Specifications 21047/04, [Class 2, Acids and salts, Organic &;c.], and 293,703, [Class 2 (iii), Dyes &;c.], are referred to.;3>;1>;3>;4>;FORM:0372013/IV/1>
替代
甘油酸酯,
化学式为 <;FORM:0372013/IV/1>; 其中 R1 为氢或烷基,R2 在 R1 为氢时为环残基,在 R1 为烷基时为任何有机残基,X 代表饱和链,通过将卤代
乙酸酯与环状醛或酮(其中羟基团的碳原子与烷基和任何有机残基结合,或者是饱和环的成员)与碱
金属、碱
金属酰胺或碱
金属醇酸盐在不分离碱
金属卤化物的介质中缩合而制造,该介质在缩合过程中不会使碱
金属卤化物分离于
缩合剂,即液态烃或液态卤代烃。 通过与碱
水解、酸化溶液并蒸馏,将产品转化为替代
乙醛。 例如:(1)
苯甲醛与
氯乙酸乙酯在二
甲苯存在下通过
钠缩合,生成苯基甘
油酸乙酯,进而转化为
苯乙醛;(2)4-
甲氧基苯甲
醛类似处理;(3)4-
氯苯甲
醛类似转化为4-
氯苯基甘
油酸乙酯和4-
氯苯乙醛;(4)
苯乙酮与
氯乙酸乙酯在苯或二
甲苯存在下通过
钠酰胺缩合,产生 b -苯基-b -甲基甘
油酸乙酯,进而转化为1-氧代-2-苯基-2-甲基
乙烷(
水合
戊醛);(5)2-氧代-6 : 10-二甲基
十一烷(六氢伪离子酮)与
氯乙酸乙酯在二
甲苯中通过
钠缩合,生成相应的
甘油酸酯,转化为1-氧代-2 : 6 : 10-三甲基
十一烷;(6)去氢-2-氧代
萘烷(b -去氢基酮)类似产生相应的
甘油酸酯,转化为去氢-
2-萘甲醛;(7)1 : 1 : 3-三甲基-2-(23 - 氧代丁基)-
环己烷(四氢伊酮)类似缩合以产生相应的
甘油酸酯,转化为1 : 1 : 3-三甲基-2-(2<;4>; - 氧代 - 2<;3>; - 甲基丁基) -
环己烷。 还给出了从以下物质获得的替代
甘油酸酯和替代
乙醛的性质:4-甲基和
4-乙基苯甲醛,2 : 4-二甲基
苯甲醛,
4-异丙基苯甲醛,4-(1<;1>;-甲基丙基)-
苯甲醛(通过
一氧化碳在
氯化铝存在下作用于2-苯基
丁烷获得),2 : 4-二
异丙基苯甲醛,5 : 6 : 7 : 8-四氢-
1-萘甲醛(通过
一氧化碳在
氯化铝存在下作用于四氢
萘烷获得);2-氧代
癸烷(甲基辛酮),2-氧代
十一烷(甲基壬酮),2-氧代-2-(对异丙基苯基)-
乙烷(对异丙基
苯乙酮),2-氧代-2-(对
甲氧基苯基)-
乙烷(甲基 - 对 -
甲氧基苯基酮),2 - 氧代 - 4-苯基
丁烷,2 - 氧代- 4 - (对异丙基苯基)-
丁烷,和1 : 1 : 3-三甲基-2-(2<;3>;-氧代戊基)-
环己烷(通过氢化相应的 a -甲基伊酮获得)。 另一方面指定的起始材料是
萘甲醛和
糠醛,另一方面是
溴乙酸酯。 参考规范 21047/04,[2类,酸和盐,有机等],和 293,703,[2类(iii),
染料等]。