PRODUCTION OF 2-SUBSTITUTED 4-METHYL-TETRAHYDROPYRANS FROM STARTING MATERIALS CONTAINING 2-ALKYL-4,4-DIMETHYL-1,3-DIOXANES
申请人:BASF SE
公开号:US20170037020A1
公开(公告)日:2017-02-09
The invention relates to a method for producing 2-substituted 4-methyltetrahydropyrans of general formula (I) from starting materials containing at least one 2-substituted 4,4-dimethyl-1,3-dioxane of general formula (II).
Heteropoly acid catalysts in Prins cyclization for the synthesis of Florol®
作者:Augusto L.P. de Meireles、Kelly A. da Silva Rocha、Elena F. Kozhevnikova、Ivan V. Kozhevnikov、Elena V. Gusevskaya
DOI:10.1016/j.mcat.2020.111382
日期:2021.2
H3PW12O40 heteropoly acid supported on SiO2 and its bulk acidic cesium salt Cs2.5H0.5PW12O40 are demonstrated to be highly active and recyclable solid catalysts for Prins cyclization allowing for the clean, high-yielding synthesis of Florol® from isoprenol and isovaleraldehyde. Florol®, a valuable floral odorant employed in a vast variety of commercial products, was obtained in ca. 80 % yield under
SiO 2上负载的H 3 PW 12 O 40杂多酸及其本体酸性铯盐Cs 2.5 H 0.5 PW 12 O 40是高活性且可回收的固体催化剂,可用于Prins环化反应,从而实现清洁,高产率的Florol合成®由异戊烯醇和异戊醛制成。Florol®是一种可在多种商业产品中使用的有价值的花香剂,大约在2000年获得。在接近环境条件下的收率为80%。用作绿色反应介质的碳酸二甲酯或碳酸二乙酯,催化剂用量低和适中的条件是有助于该方法可持续性的重要特征。
PRODUCTION OF 2-SUBSTITUTED 4-HYDROXY-4-METHYL-TETRAHYDROPYRANS FROM STARTING MATERIALS CONTAINING 2-ALKYL-4,4-DIMETHYL-1,3-DIOXANES
申请人:BASF SE
公开号:US20170037022A1
公开(公告)日:2017-02-09
The present invention relates to a method for preparing 2-substituted 4-hydroxy-4-methyltetrahydropyrans from starting materials comprising at least one 2-alkyl-4,4-dimethyl-1,3-dioxane.
Herstellung von 2-substituierten 4-Methyl-tetrahydropyranen aus 2-Alkyl-4,4-dimethyl-1,3-dioxan-haltigen Ausgangsstoffen
申请人:BASF SE
公开号:EP2865676A1
公开(公告)日:2015-04-29
Die vorliegende Erfindung betrifft ein Verfahren zur Herstellung von 2-substituierten 4-Methyl-tetrahydropyranen der allgemeinen Formel (I)
aus Ausgangsmaterialien, die wenigstens ein 4,4-Dimethyl-1,3-dioxan der allgemeinen Formel (II) enthalten.
Production of 2-substituted 4-hydroxy-4-methyltetrahydropyrans having stable odoriferous quality
申请人:BASF SE
公开号:US10023550B2
公开(公告)日:2018-07-17
The present invention relates to a method for the production of 2-substituted 4-hydroxy-4-methyltetrahydropyrans from the acid-catalyzed reaction of 3-methylbut-3-ene-1-ol with an aldehyde, a stable odoriferous quality being achieved and avoiding off-odors that interfere with the odor sensation.