Method of preparing ortho esters and 1.1-dialkoxycycloalkanes
US5401885A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 1, 1993 |
| Grant date | Mar 28, 1995 |
| Priority date | — |
| Expiry date | Jun 1, 2013 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C2601/18
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Ortho esters of the structure ##STR1## wherein R.sub.1 and R.sub.2 are different or the same alkyl moieties and can be a saturated, unsaturated, branched, unbranched or cyclic alkyl moiety of 1-3 carbon atoms, are prepared by first anhydrously reacting hydrogen cyanide or a hydrogen cyanide derivative with a secondary alkanol and hydrogen chloride in the presence of an inert organic solvent. Upon the formation of the resulting imino ether hydrochloride, more secondary alkanol is added to form the ortho esters (I). 1,1-Dialkoxycycloalkanes of the structure ##STR2## wherein R.sub.1 and R.sub.2 correspond to R.sub.1 and R.sub.2 of structure (I), and n is an integer from 4 to 9, are prepared by reacting with the imino ether hydrochloride more secondary alkanol and a cycloalkanone having 5 to 10 carbon atoms.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.