摘要:
Embodiments herein concerns the eco-friendly conversion of simple alcohols to linear or branched functionalized alkanes, by integrated catalysis. The alcohols are firstlyoxidized either chemically or enzymatically to the corresponding aldehydes or ketones, followed by aldol condensations using a catalyst to give the corresponding enals or enones. The enals or enones are subsequently and selectively hydrogenated using a recyclable heterogeneous metal catalyst, organocatalyst or an enzyme to provide linear or branched functionalized alkanes with an aldehyde, keto- or alcohol functionality. The process is also iterative and can be further extended by repeating the above integrated catalysis for producing long-chain functionalized alkanes from simple alcohols.
摘要:
An aryl-substituted alkanal compound having a molecular weight of less than 300 g/mol and which bears a substituent on the aryl ring ortho to a substituent bearing the aldehyde functionality. Said compounds are useful as perfume ingredients in personal care and household care products.
摘要:
The present invention relates to a process for preparing aldehydes by reacting an α,β-unsaturated carboxylic acid or a salt thereof with carbon monoxide and hydrogen in the presence of a catalyst comprising at least one complex of a metal of transition group VIII of the Periodic Table of the Elements with at least one compound of the formula (I), where Pn is pnicogen; W is a divalent bridging group having from 1 to 8 bridge atoms between the flanking bonds; R1 is a functional group capable of forming at least one intermolecular, noncovalent bond with the —X(═O)OH group of the compound of the formula (I); R2, R3 are each in each case optionally substituted alkyl, cycloalkyl, heterocycloalkyl, aryl or hetaryl or together with the pnicogen atom and together with the groups Y2 and Y3 if present form an optionally fused and optionally substituted 5- to 8-membered heterocycle; a, b and c are each 0 or 1; and Y1,2,3 are each, independently of one another, O, S, NRa or SiRbRc, where Ra,b,c are each H or in each case optionally substituted alkyl, cycloalkyl, heterocycloalkyl, aryl or hetaryl; and the use of the above-described catalyst for the decarboxylative hydroformylation of α,β-unsaturated carboxylic acids.
摘要翻译:本发明涉及一种通过使α-,β-不饱和羧酸或其盐与一氧化碳和氢气在催化剂存在下反应来制备醛的方法,所述催化剂包含至少一种式 具有式(I)的至少一种化合物的元素周期表,其中Pn是pnicogen; W是在侧翼键之间具有1至8个桥原子的二价桥连基团; R1是能够与式(I)化合物的-X(= O)OH基团形成至少一个分子间,非共价键的官能团; R2,R3各自为任选取代的烷基,环烷基,杂环烷基,芳基或杂芳基,或与pnicogen原子一起并与Y2和Y3基团一起形成任选稠合的和任选取代的5-至8-元杂环; a,b和c各自为0或1; 其中R a,b,c各自为H,或者在每种情况下均为任选取代的烷基,环烷基,杂环烷基,芳基或杂芳基;其中R 1和R 2各自独立地为O,S,NR a或SiR b R c。 以及使用上述催化剂进行α,β-不饱和羧酸的脱羧加氢甲酰化反应。
摘要:
Improved citral derivatives, and fragrances and flavorings including the derivatives, that have a longer useful shelf life than citral and/or fragrances and flavorings including citral, are disclosed. In particular, the derivatives maintain the fragrance characteristics of citral, while lowering the allergic properties, and lemony flavors and fragrances with a longer shelf-life than citral, are disclosed. Also disclosed are methods of making the derivatives, and articles of manufacture including the derivatives. In one embodiment, the derivatives are prepared by replacing one or more double bonds in citral with a cyclopropyl group, which can be unsubstituted, or substituted with one or two lower alkyl, preferably methyl groups. The alkyl groups can optionally be substituted, for example, with electron donating groups, electron with drawing groups, groups which increase the hydrophilicity or hydrophobocity, and the like. In another embodiment, the derivatives are prepared by replacing the aldehyde group in citral with a nitrile, methyl ether or acetal group. The acetal groups can provide the compounds with a long lasting flavor or fragrance, where the acetals slowly hydrolyze to provide the aldehyde group in citral. In some embodiments, both the aldehyde and at least one of the double bond functional groups are both derivatized as described herein. Examples of suitable articles of manufacture include candles, air fresheners, perfumes, disinfectant compositions, hypochlorite (bleach) compositions, beverages such as beer and soda, denture cleanser tablets and flavored orally-delivered products such as lozenges, candies, and the like.
摘要:
This invention relates to campholenic derivatives of general formula (I) Wherein R1, R2, R3, R4 and R5 represent, each independently, a hydrogen atom or a linear or branched C1-C5 alkyl or C2-C5 alkenyl group, Y represents a CN, a C(O)R6 or a CR6(ORα) (ORβ) group, wherein R6 represents a hydrogen atom or a linear or branched C1-C5 alkyl or C2-C5 alkenyl group, and Rα and Rβ represent simultaneously a linear or branched C1, C2, C3, C4 or C5 alkyl or C2, C3, C4 or C5 alkenyl group and can form together a cycle, the 5-membered ring is saturated or has a double bond between C3′ and C4′ in formula (I), and the side chain, optionally, has a double bond between C1 and C2 and/or between C3 and C4, provided that the derivative is not 3-methyl-6-(2,2,3-trimethyl-cyclopent-3-enyl)-hex-4-enal; and their use as fragrant or flavouring agent.
摘要:
Lewis acid-catalyzed reaction of an alkene, including cycloalkenes, with an epoxide to provide an aldehyde which may be reduced to the corresponding alcohol. The reaction products may be used to provide perfumes or perfume products.
摘要:
A heterocyclically substituted ethane having a formula:R.sub.1 --Cy--CH.sub.2.CH.sub.2 --A--R.sub.2 Formula IwhereinA represents a heterocyclic ring selected from a trans 2,5 disubstituted 1,3 dioxan ring and a 2,5 disubstituted 1,3-pyrimidine ring;R.sub.1 represents an alkyl group having from 1 to 15 carbon atoms and R.sub.2 represents a group selected from hydrogen, alkyl having from 1 to 15 carbon atoms and alkoxy having from 1 to 15 carbon atoms provided that where A is a trans 2,5 disubstituted 1,3 dioxan ring R.sub.2 is alkyl; andCy represents a trans-1,4 disubstituted cyclohexane ring.
摘要翻译:具有下式的杂环取代的乙烷:R1-Cy-CH2CH2-A-R2式I其中A表示选自反式2,5-二取代的1,3-二恶烷环和2,5-二取代的1,3-二恶烷环的杂环, 嘧啶环; R 1表示具有1至15个碳原子的烷基,R 2表示选自氢,具有1至15个碳原子的烷基和具有1至15个碳原子的烷氧基的基团,条件是其中A为反式2,5-二取代的1 ,3个二烷基环R2是烷基; 而Cy表示反式-1,4-二取代的环己烷环。
摘要:
An aryl-substituted alkanal compound having a molecular weight of less than 300 g/mol and which bears a substituent on the aryl ring ortho to a substituent bearing the aldehyde functionality. Said compounds are useful as perfume ingredients in personal care and household care products.
摘要:
An aryl-substituted alkanal compound having a molecular weight of less than 300 g/mol and which bears a substituent on the aryl ring ortho to a substituent bearing the aldehyde functionality. Said compounds are useful as perfume ingredients in personal care and household care products.