[1,5]-Brook rearrangement: an overlooked but valuable silyl migration to synthesize configurationally defined vinylsilane. The unique steric and electronic effects of geminal bis(silane)
geminal bis(silyl) homoallylic alcohol is described. The unique steric and electroniceffects of geminal bis(silane) were found to be crucial for promoting this long-range silyl migration, as well as for facilitating the subsequent gamma/Z-selective addition of silyl allyllithium with carbonyl compounds to synthesize diverse configurationally defined Z-vinylsilanes.
Process for preparing mixture of trimethyl and dimethylmethylene propyl
申请人:International Flavors & Fragrances Inc.
公开号:US05378685A1
公开(公告)日:1995-01-03
Described is a process for preparing trimethyl and dimethylmethylene propyl polyhydropyran derivatives including compounds defined according to the structure: ##STR1## which defines a mixture wherein in the mixture, in each of the compounds one of the dashed lines is a carbon-carbon double bond and each of the other of the dashed lines represents a carbon-carbon single bond as well as the compound having the structure: ##STR2## products produced thereby; perfumery uses of such products; process intermediates of such process including compounds defined according to the structures: ##STR3## wherein X represents chloro or bromo.
Verwendung von But-3-en-1-ol-Verbindungen zur Stabilisierung von Zusammensetzungen, die Chlorfluoralkane neben Aminen, Aminoalkoholen und aminbasischen Polyolen enthalten.
使用丁-3-烯-1-醇化合物来稳定含有氯氟烃以及胺、氨基醇和以胺为基础的多元醇的成分。
[DE] REINIGUNGSMEDIUMZUSAMMENSETZUNG<br/>[EN] CLEANING-FLUID COMPOSITION<br/>[FR] COMPOSITION D'UN DETERGENT
申请人:CHEMIE X 2000 SCHRUPSTOCK GMBH & CO. KG
公开号:WO1994005765A1
公开(公告)日:1994-03-17
(DE) Die Erfindung betrifft eine Reinigungsmediumzusammensetzung, und insbesondere eine Reinigungsmediumzusammensetzung zur Reinigung von feinmechanischen Teilen, elektronischen Bauteilen und Leiterplatten sowie Textilien, sowie ein Verfahren zu deren Herstellung und deren Verwendung zu den vorgenannten Zwecken.(EN) The invention concerns a cleaning-fluid composition, in particular a composition for cleaning precision-mechanical parts, electronic components and circuit boards, as well as textiles, plus a method of producing the composition and its use for the purposes stated above.(FR) La présente invention concerne la composition d'un détergent, en particulier celle d'un détergent destiné au nettoyage de pièces de mécanique de précision, de composants électroniques et de cartes de circuits imprimés, ainsi que de textiles, de même que son procédé de fabrication et son mode d'utilisation dans les buts précités.