Diels-Alder reaction of aldehydes with simple dienes
申请人:QUEST INTERNATIONAL B.V.
公开号:EP0854143A1
公开(公告)日:1998-07-22
The invention concerns Diels-Alder reactions between non-activated aldehydes RCHO in which R is a C1-C10 aliphatic group or phenyl group, which is unsubstituted or substituted with one or more C1-C5 alkyl groups or one other functional group, with simple aliphatic dienes R1CH=CR2-CR3=CHR4 in which R1-R4 are H or C1-C5 alkyl groups using as a catalyst a perfluorinated organic sulphonic acid or a Brönsted acid derivative thereof. The reaction leads to dihydropyrans of the structure below in which R1-R4 have the meaning indicated above.
The preferred perfluorinated organic sulfonic acids are perfluorooctanesulphonic acid, triflic acid, Nafion or a Brönsted acid derivative of triflic acid.
The preferred aldehydes are those wherein R is a C2-C6 aliphatic group or a phenyl group which is unsubstituted or mono-substituted with C1-C3 alkyl or with 4-Cl, 4-nitro or 3-methoxy. The preferred dienes are those wherein the groups R1-R4 are H or methyl.
本发明涉及非活化醛 RCHO(其中 R 为未取代或被一个或多个 C1-C5 烷基或一个其它官能团取代的 C1-C10 脂肪族基团或苯基)与简单脂肪族二烯 R1CH=CR2-CR3=CHR4 (其中 R1-R4 为 H 或 C1-C5 烷基)之间的 Diels-Alder 反应,该反应使用全氟有机磺酸或其勃氏酸衍生物作为催化剂。反应生成以下结构的二氢吡喃,其中 R1-R4 具有上述含义。
优选的全氟有机磺酸是全氟辛烷磺酸、三氟丙烯磺酸、Nafion 或三氟丙烯磺酸的勃氏酸衍生物。
优选的醛是那些其中 R 为 C2-C6 脂肪族基团或苯基的醛,该基团未被 C1-C3 烷基或 4-Cl、4-硝基或 3-甲氧基取代或被 C1-C3 烷基单取代。优选的二烯烃是基团 R1-R4 为 H 或甲基的二烯烃。
A FRAGRANCE-DELIVERY COMPOSITION COMPRISING PERSULFATE ION-CROSSLINKED POLYVINYL ALCOHOL MICROCAPSULES AND METHOD OF USE THEREOF
申请人:APPVION, INC.
公开号:EP2907568A1
公开(公告)日:2015-08-19
An aqueous composition is provided having a pH of from about 2.0 to about 5.7 to about 12.8 and comprising boron or persulfate ion-crosslinked polyvinyl alcohol microcapsules. A method of delivering a fragrance to a substrate is further provided comprising applying to the substrate an aqueous composition comprised of fragrance-containing, boron or persulfate ion-crosslinked, polyvinyl alcohol microcapsules, as well as a method of cleaning a substrate comprising applying to the substrate an aqueous composition comprised of fragrance-containing, boron or persulfate ion-crosslinked, polyvinyl alcohol microcapsules together with at least one cleaning component.
Freshening compositions and devices comprising same
申请人:The Procter & Gamble Company
公开号:US10113140B2
公开(公告)日:2018-10-30
The present invention relates to freshening compositions and devices comprising same that comprise a composition comprising malodor reduction compositions and methods of making and using such compositions. Such malodor control technologies do not unduely interfere with the scent of the perfumed or unperfumed situs that is treated with the malodor control technology.