| 摘要 |
1293830 1,2 - Disubstituted - 2 - hydroxy - 3 (or 4)-pentynes FMC CORP 30 Oct 1970 [31 Oct 1969] 10618/72 Divided out of 1293829 Heading C2C The invention comprises compounds of the Formulµ I and II, where X<SP>1</SP> is hydroxy or a group hydrolysable thereto under basic conditions and the preparation of compounds I by reacting an epoxide III where X is a group hydrolysable to a hydroxy group with a phenylacetylene derivative C 6 H 5 C#CM, where M is an alkali metal or magnesium halide residue and, if desired hydrolysing the groups X<SP>1</SP> in the obtained compound to hydroxy groups, and the preparation of compounds II by reacting a ketone CO(CH 2 X) 2 with a benzylacetylene C 6 H 5 CH 2 C#CM and, if desired, hydrolysing groups X in the product to hydroxy groups. 1,3 - Diacetoxypropanone-2 is made by reacting 1,3-dihydroxypropanone-2 with aceticanhydride in the presence of trifluoroacetic-acid 1,3 - Bis - (tetrahydropyran - 2 - yloxy) - 2 - propanone may be made by reacting 2,3-dihydropyran with 1,3-dihydroxy-2-propanone in the presence of p-toluenesulphonic acid. |
