[EN] ESTERS AND ETHERS OF 2,2,4,4-TETRAMETHYLCYCLOBUTANE-1,3-DIOL FOR USE AS AROMA CHEMICALS<br/>[FR] ESTERS ET ÉTHERS DE 2,2,4,4-TÉTRAMÉTHYLCYCLOBUTANE -1,3-DIOL DESTINÉS À ÊTRE UTILISÉS EN TANT QUE PRODUITS CHIMIQUES AROMATIQUES
申请人:BASF SE
公开号:WO2019048544A1
公开(公告)日:2019-03-14
The present invention relates to the use of a compound of the general formula (I) wherein R1 is C1-C4-alkyl or -(C=0)-R3, R2 is hydrogen, C1-C4-alkyl or -(C=0)-R4, and R3 and R4, independently of one another, are selected from the group consisting of hydrogen and C1-C4-alkyl, a stereoisomer thereof or a mixture of stereoisomers thereof, as an aroma chemical, to aroma chemical compositions comprising at least one compound of the general formula (I), a stereoisomer thereof or a mixture of stereoisomers thereof, and to a method for preparing a fragranced ready-to-use composition, which comprises incorporating at least one compound of the general formula (I), a stereoisomer thereof or a mixture of stereoisomers thereof, into a ready- to-use composition. The present invention further relates to specific ethers and specific esters of the compounds of the general formula (I) and a method for their preparation.
Trimethysilyl triflate in organic synthesis11Part 11 of this series. Part 10: S. Murata and R. Noyori, Tetrahedron Letters 2107 (1981).
作者:R. Noyori、S. Murata、M. Suzuki
DOI:10.1016/s0040-4020(01)93263-6
日期:——
Trimethylsilyl triflate is a powerful silylating agent for organic compounds and acts as a catalyst which accelerates a variety of nucleophilic reactions in aprotic media. The reactions proceed via one-center, electrophilic coordination of the silyl group to hetero functional groups and exhibit unique selectivities.
Ambergris and/or indole-like compositions of odoriferous substances
申请人:SYMRISE AG
公开号:US10920169B2
公开(公告)日:2021-02-16
The present invention primarily relates to the use of one or more compound(s) of formula (I)
as fragrance, wherein R is methyl or ethyl and R1 is H, methyl or ethyl. The invention further relates to new fragrance compositions comprising one or more compound(s) of formula (I), as described herein, the use of said fragrance compositions, perfumed articles comprising said fragrance compositions, and various methods of perfuming said articles or for imparting, modifying and/or enhancing certain olfactory notes.
[EN] SUBSTITUTED 4-METHYLENE-TETRAHYDROPYRANS, 4-METHYL-DIHYDROPYRANS AND 4-METHYL-TETRAHYDROPYRANS AND USE THEREOF AS AROMA CHEMICALS<br/>[FR] 4-MÉTHYLÈNE-TÉTRAHYDROPYRANES, 4-MÉTHYL-DIHYDROPYRANES ET 4-MÉTHYL-TÉTRAHYDROPYRANES SUBSTITUÉS ET UTILISATION CORRESPONDANTE EN TANT QUE PRODUITS CHIMIQUES AROMATIQUES
申请人:BASF SE
公开号:WO2021122558A1
公开(公告)日:2021-06-24
The present invention relates to substituted 4-methylene-tetrahydropyrans, 4-methyl- dihydropyrans and 4-methyl-tetrahydropyrans of formula (I), where the variables are as defined in the claims and description, to a stereoisomer thereof, to a mixture of stereoisomers thereof, to a mixture of different di- and tetrahydropyrans (I) and to a mixture containing at least one di- or tetrahydropyran (I) and at least one cyclic acetal which is a 1,3-dioxan carrying in 2-position an isobutanol-2-yl- (derived) substituent and in 4,4- or 5,5-position two methyl substituents. The invention also relates to the use of such compounds as an aroma chemical and/or for modifying and/or enhancing the aroma of a composition, to compositions comprising such compounds, to methods for preparing such compounds and to a product obtainable by these methods.
Simple Method for the Preparation of Dimethyl Acetals from Ketones with Montmorillonite K 10 and p‐Toluenesulfonic Acid
作者:Horacio Mansilla、David Regás
DOI:10.1080/00397910600639315
日期:2006.6
Abstract A simple method for conversion of ketones to their corresponding dimethyl acetals using montmorillonite K 10 and p‐toluenesulfonic acid as acidic cocatalysts under very mild reaction conditions is described.
摘要描述了一种在非常温和的反应条件下使用蒙脱石 K 10 和对甲苯磺酸作为酸性助催化剂将酮转化为其相应二甲基缩醛的简单方法。