| 摘要 |
<p>The present invention provides gasoline compositions and gasoline additive concentrates containing compounds of general formula (I), wherein R<1> represents a hydrogen atom or an alkyl, aryl or alkaryl group; R<2>O is a residue of a polyether mono-ol or a hydrocarbyl mono-ol of formula R<2>OH; and R<3> and R<4> each represent a hydrogen atom or together represent a carbon-carbon single bond, wherein when R<3> and R<4> each represent a hydrogen atom, then each of R<5> and R<6> independently represents a group -CH2N(R<7>)2 in which each R<7> independently represents a hydrogen atom or an optionally substituted alkyl group, and when R<3> and R<4> together represent a carbon-carbon single bond, then R<5> and R<6> each represent a cyano group; use of the compounds of formula (I) as gasoline additives for reducing intake valve deposit formation; novel compounds, being compounds of formula (I) above, with the proviso that when R<1> is a hydrogen atom or a C1-C4 alkyl group, R<3> and R<4> together represent a carbon-carbon single bond, and R<5> and R<6> each represent a cyano group, then R<2>O is a residue of a polyether mono-ol of formula R<2>OH; and a process for the preparation of the novel compounds of formula (I).</p> |
