A novel synthetic method for (R)- and (S)-muscones by enantioselective hydrogenation of (E)- and (Z)-3-methyl-2-cyclopentadecen-1-ones catalyzed by p-tolyl-BINAP-Ru(II) complexes
A novel and practical synthesis of (R)- and (S)-muscones by the asymmetric hydrogenation of (E)- and (Z)-3-methyl-2-cyclopentadecen-1-ones catalyzed by p-tolyl-BINAP-Ru(II) complexes has been achieved in nearly complete enantioselectivity.
METHOD FOR PRODUCING 3-METHYL-CYCLOPENTADECENONES, METHOD FOR PRODUCING (R)- AND (S)- MUSCONE, AND METHOD FOR PRODUCING OPTICALLY ACTIVE MUSCONE
申请人:Doya Masaharu
公开号:US20110172465A1
公开(公告)日:2011-07-14
By intramolecular condensation reaction of 2,15-hexadecanedione in a gaseous phase with a compound of a Group II element of the Periodic Table as a catalyst, 3-methyl-cyclopentadecenones is generated. Magnesium oxide, calcium oxide, or zinc oxide is desirable as the catalyst for the intramolecular condensation reaction. (R)- and (S)-muscone is generated by subjecting 3-methyl-cyclopentadecenones obtained as above to hydrogenation by using a catalyst. Palladium catalyst is desirable as the hydrogenation catalyst. Optically active muscone is generated by separating 3-methyl-cyclopentadecenones into respective components thereof by means of precision distillation and subsequently subjecting the separated 3-methyl-cyclopentadecenones to asymmetric hydrogenation by using an optically active ruthenium complex catalyst. The production methods described above enable easy and economical production of 3-methyl-cyclopentadecenones, (R)- and (S)-muscone, and optically active muscone.
Acetoacetic acid derivatives, process for their preparation and their use
申请人:——
公开号:US20010056195A1
公开(公告)日:2001-12-27
The present invention relates to acetoacetic acid derivatives of the formula Ia or Ib, to processes for their preparation and to their use for the preparation of 2,15-hexadecanedione. The invention further relates to the use of the compounds of the formula Ia or Ib
1
where R is an optionally substituted straight-chain or branched C
1
-C
6
-alkyl, C
1
-C
6
-alkoxyalkyl or phenyl radical, alkoxy groups are a combination of an alkyl group according to the above definition with an oxygen atom, e.g. methoxy, ethoxy, propoxy, butoxy or pentoxy groups, which comprises adding an acetoacetic ester of the formula II
2
to 1,9-decadiene by a free-radical means, as intermediate for the preparation of muscone (3-methylcyclopentadecanone).
Acetessigsäure-Derivate, Verfahren zu ihrer Herstellung und ihre Verwendung
申请人:BASF AKTIENGESELLSCHAFT
公开号:EP1156029A1
公开(公告)日:2001-11-21
Die vorliegende Erfindung betrifft Acetessigsäure-Derivate der Formel Ia bzw. Ib, Verfahren zu ihrer Herstellung und ihre Verwendung zur Herstellung von 2,15-Hexadecandion. Ein weiterer Gegenstand der Erfindung ist die Verwendung der Verbindungen der Formel Ia bzw. Ib
wobei R einen gegebenenfalls substituierten geradkettigen oder verzweigten C1-C6-Alkyl-, C1-C6-Alkoxyalkyl oder Phenylrest bedeutet,
Alkoxygruppen bedeuten eine Kombination einer Alkylgruppe gemäß der obigen Definition mit einem Sauerstoffatom, z.B. Methoxy-, Ethoxy-, Propoxy-, Butoxy- oder Pentoxygruppen, dadurch gekennzeichnet, daß man einen Acetessigsäureester der Formel II
radikalisch an 1,9-Decandien anlagert,
als Zwischenprodukt für die Herstellung von Muscon(3-Methyl-cyclopentadecanon).
本发明涉及式 Ia 或 Ib 的乙酰乙酸衍生物、其制备工艺及其在制备 2,15-十六烷二酮中的用途。本发明的另一个目的是使用式 Ia 或 Ib 的化合物
其中 R 表示任选取代的直链或支链 C1-C6 烷基、C1-C6-烷氧基烷基或苯基、
烷氧基表示如上定义的烷基与氧原子的组合,如甲氧基、乙氧基、丙氧基、丁氧基或戊氧基。
从根本上连接到 1,9-癸二烯、
作为制备麝香酮(3-甲基环十五烷酮)的中间体。