Addition reaction of hydroxyl-containing compounds with alkynes or allenes

US6060035A · kind A · utility

Assignee

• BASF SE

Inventors

• Joaquim Henrique Teles · Waldsee, DE
• Norbert Rieber · Mannheim, DE
• Klaus Breuer · Speyer, DE
• Dirk Demuth · Schallstadt, DE
• Hartmut Hibst · Schriesheim, DE
• Alfred Hagemeyer · Sunnyvale, US

Key dates

• Filing date: Jun 5, 1998
• Grant date: May 9, 2000
• Expiry date: Jun 5, 2018

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C41/54
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

Compounds of the formulae I and II ##STR1## are prepared by an addition reaction of a compound of the formula III EQU R.sup.1 OH III with an acetylene or allene of the formula IV or V ##STR2## where R.sup.1 and R are as defined, in the gas phase at elevated temperatures in the presence of a heterogeneous, silicate-containing catalyst, by a process in which the catalyst used is one which contains or consists of, as the active component, a zinc silicate obtained by precipitation in aqueous solution from a soluble silicon compound and zinc compound, zinc silicate being PA0 a) an essentially X-ray amorphous zinc silicate of the formula VI EQU Zn.sub.a Si.sub.c O.sub.a+2c-0.5e (OH).sub.e.fH.sub.2 O VI, PA0 where e is from 0 to 2a+4c and the ratio a:c is from 1 to 3.5, and the ratio f:a is from 0 to 200, and/or PA0 b) a crystalline zinc silicate having the structure of hemimorphite of the formula Zn.sub.4 Si.sub.2 O.sub.7 (OH).sub.2.H.sub.2 O.