[EN] HYDROGENATION OF ESTERS OR CARBONYL GROUPS WITH TETRADENTATE AMINO/IMINO-THIOETHER BASED RUTHENIUM COMPLEXES [FR] HYDROGÉNATION DE GROUPES ESTERS OU CARBONYLES AVEC DES COMPLEXES DU RUTHÉNIUM À BASE D'AMINO/IMINO-THIOÉTHER TÉTRADENTATE
BF<sub>3</sub>·Et<sub>2</sub>O-Catalyzed Direct Carbon−Carbon Bond Formation of α-EWG Ketene-(<i>S</i>,<i>S</i>)-Acetals and Alcohols and Synthesis of Unsymmetrical Biaryls
作者:Qian Zhang、Shaoguang Sun、Jianglei Hu、Qun Liu、Jing Tan
DOI:10.1021/jo061775e
日期:2007.1.1
efficient BF3·OEt2-catalyzed formal dehydration C−C coupling reaction between readily available α-EWG ketene-(S,S)-acetals and various alcohols via direct substitution of the hydroxy group in alcohols has been developed. On the basis of this C−C coupling reaction, a series of alkylated α-EWG ketene-(S,S)-acetals and functionalized 1,4-pentanedienes were prepared in high to excellent yields and the unsymmetrical
[EN] HYDROGENATION OF ESTERS OR CARBONYL GROUPS WITH TETRADENTATE AMINO/IMINO-THIOETHER BASED RUTHENIUM COMPLEXES<br/>[FR] HYDROGÉNATION DE GROUPES ESTERS OU CARBONYLES AVEC DES COMPLEXES DU RUTHÉNIUM À BASE D'AMINO/IMINO-THIOÉTHER TÉTRADENTATE
申请人:FIRMENICH & CIE
公开号:WO2012084810A1
公开(公告)日:2012-06-28
The present invention relates to the field of catalytic hydrogenation and, more particularly, to the use of specific ruthenium catalysts, or pre-catalysts, in hydrogenation processes for the reduction of ketones and/or aldehydes into the corresponding alcohol respectively. Said catalysts are ruthenium complexes comprising a tetradentate ligand (L4) coordinating the ruthenium with: - two nitrogen atoms, each in the form of a primary or secondary amine (i.e. a NH2 or NH group) or N-alkyl imine functional groups (i.e. a C=N group), and - two sulfur atoms, each in the form of thioether functional groups.
Compounds represented by the formula:
1
wherein R
1
and R
2
are hydrogen atom, a hydrocarbon group or a heterocyclic group, or R
1
and R
2
may form, together with the adjacent carbon atom, a 3- to 8-membered homocyclic or heterocyclic ring,
W indicates
(i) a group represented by the formula:
2
wherein ring B indicates a 5- to 7-membered ring, or
(ii) a group represented by the formula:
3
wherein R
4
indicates (1) an aliphatic hydrocarbon group, which may be substituted with an aromatic group, or (2) an acyl group containing an aromatic group, R
5
is hydrogen atom, a C
1-6
alkyl, or an acyl group, provided that, when W is Wa, R
3
is hydrogen atom, a hydrocarbon group or a heterocyclic group, when W is Wb, R
3
indicates a C
6-14
aryl group, or salts thereof or prodrugs thereof have an excellent action to inhibit neurodegeneration and the like as well as an excellent brain penetrability and are low in the toxicity, thereby being useful as prophylactic or therapeutic drugs for nerve degenerative diseases and the like.
由以下公式代表的化合物:
其中 R1 和 R2 是氢原子、烃基或杂环基,或者 R1 和 R2 可以与相邻的碳原子一起形成 3 至 8 个成员的同环或杂环环,W 表示
(i) 由以下公式代表的基团:
其中环 B 表示一个 5 至 7 个成员的环,或者
(ii) 由以下公式代表的基团:
其中 R4 表示 (1) 可以用芳香基取代的脂肪烃基,或者 (2) 含有芳香基的酰基,R5 是氢原子、C1-6 烷基或酰基,提供当 W 是 Wa 时,R3 是氢原子、烃基或杂环基,当 W 是 Wb 时,R3 表示一个 C6-14 芳基,或其盐或前药具有优异的抑制神经退行性等作用,以及出色的脑透过性,毒性低,因此可用作预防或治疗神经退行性疾病等的药物。
ODORANTS WITH ANISIC NOTES
申请人:Moretti Robert
公开号:US20120208741A1
公开(公告)日:2012-08-16
The present invention concerns the use as perfuming ingredients of para-substituted derivatives of α-methyl cinnamic alcohol of formula (I) in the form of any one of its stereoisomers or a mixture thereof, and wherein R represents a hydrogen atom, a C
1-4
alkyl or alkenyl group or a formyl or acetyl group; R
1
represents a hydrogen atom or a methyl group; R
2
represents a methyl, ethyl or methoxy group; and R
3
represents a CH
2
group or a carbon-carbon double bond. The present invention concerns the use of said compound in the perfumery industry as well as the compositions or articles containing said compound.
PERFUMING INGREDIENTS OF THE FLORAL AND/OR ANIS TYPE
申请人:Moretti Robert
公开号:US20110229426A1
公开(公告)日:2011-09-22
The present invention concerns the use as perfuming ingredient, for instance to impart odor notes of the floral and/or green type, of a compound of formula 5 wherein R is an ortho, meta or para substituent of the phenyl, and represents a hydrogen atom or a C 1-2 alkyl or alkoxyl group; R 1 represents a hydrogen atom or a methyl or ethyl group; 10 R 2 represents a hydrogen atom or a C 1-3 alkyl group; and X represents a CHO, COOR 3, CH(OR 4) 2 or CN group, R 3 being a methyl or ethyl group, and R 4, taken seperately, being a methyl or ethyl group, or said R 4, taken together, a C 2-5 alkanediyl group; and at least one of said R, R 1 or R 2 represents a group containing at least one carbon atom.