Synthesis of α-nitro derivatives of δ-oxocarboxylic and glutaric acids in heterogeneous catalytic system ionic liquid—KHCO3
作者:S. G. Zlotin、G. V. Kryshtal、G. M. Zhdankina、A. V. Bogolyubov、S. G. Postikova、V. A. Tartakovsky
DOI:10.1007/s11172-007-0230-x
日期:2007.8
An expedient method for the synthesis of α-nitro-δ-oxocarboxylic and α-nitroglutaric acid esters, including ones with isoprenoid substituents, by the solvent-free reaction of the corresponding alkyl α-nitrocarboxylates with activated olefins, assisted by heterogeneous catalytic system KHCO3—1-butyl-3-methylimidazolium tetrafluoroborate ([bmim][BF4]), was elaborated. The product yields remain stable
Diiodosamarium, a unique catalyst precursor for ene reactions of unsaturated carbonyl compounds
作者:Tarun K. Sarkar、Sandip K. Nandy
DOI:10.1016/0040-4039(96)01049-0
日期:1996.7
SmI2 presents catalytic activity for ene cyclizations of a series of unsaturated carbonylcompounds, some of which are prone to rearrangement or polymerization under standard conditions.
A method of providing a fragrant odour to an application, comprising the addition thereto of at least one compound of the formula I
wherein X and Y are independently selected from the group consisting of —CR
1
R
2
R
3
, —NR
4
R
5
and —OR
6
, wherein R
1
to R
5
are selected from H and essentially hydrocarbon moieties that optionally comprise at least one oxygen, nitrogen or silicon atom, and R
6
is selected from essentially hydrocarbon moieties that optionally comprise at least one oxygen, nitrogen or silicon atom; and, A is an essentially hydrocarbon moiety that optionally comprises at least one oxygen, sulphur, nitrogen or silicon atom, with the proviso that the compound A-CHO is a fragrant aldehyde. The use of these compounds in laundry, household and personal care products confers a long-lasting freshness.
A method of providing a fragrant odour to an application, comprising the addition thereto of at least one compound of the formula (I) wherein X and Y are independently selected from the group consisting of —CR
1
R
2
R
3
, —NR
4
R
5
and —OR
6
, wherein R
1
to R
5
are selected from H and essentially hydrocarbon moieties that optionally comprise at least one oxygen, nitrogen or silicon atom, and R
6
is selected from essentially hydrocarbon moieties that optionally comprise at least one oxygen, nitrogen or silicon atom; and A is an essentially hydrocarbon moiety that optionally comprises at least one oxygen, sulphur, nitrogen or silicon atom, with the proviso that the compound A-CHO is a fragrant aldehyde. The use of these compounds in laundry, household and personal care products confers a long-lasting freshness.