| 摘要 |
1,231,126. Tetraoxaspiro - (5,5) - undecanes. MERCK PATENT G.m.b.H. 7 Nov., 1969 [7 Dec., 1968], No. 54676/69. Heading C2C. [Also in Division C3] The invention relates to tetraoxaspiro- (5,5)-undecanes of the general formula in which R is R<SP>1</SP>-X-A-, A is a straight chained or branched alkylene group containing up to 4 carbon atoms, R<SP>1</SP> is an alkyl group containing from 2 to 21 carbon atoms or -(CH 2 ) n -COOR<SP>2</SP>, R<SP>2</SP> is an alkyl group containing up to 18 carbon atoms, n is 1, 2 or 3 and X is O or S. The compounds may be prepared by (a) reacting pentaerythritol with an aldehyde of the formula RCHO, or (b) a tetraoxaspiro-(5,5)-undecane of the formula in which A<SP>1</SP> is an alkenyl group corresponding to the radical A and containing up to 4 carbon atoms or the group AZ, and Z is an OH group which may, if desired, be reactively esterified, with a compound of the formula R<SP>1</SP>XH. Many compounds claimed per se. |
