Реферат: Алкилирование енаминов, бета-дикетонов и енаминокетонов

Данные и аннотации некоторых статей ( Belstein Abstracts).

Alkylation of Enaminoketone with a Modified Carane Skeleton. Formation of Stable b-Diketone Monoimines

A. V. Tkachev; S. A. Popov

Source details: Russ.J.Org.Chem. 1997, 33 : 5 601-606.

Document type: Journal

CODEN: RJOCEQ

Language: EN

CNR: 6090629

Original Source: Zh.Org.Khim. 1997, 33 : 5 660-665.

CODEN: ZORKAE

Language: RU

Abstract

Alkylation of a bicyclic enaminoketone, 1-((1R,5R)-3-amino-6,6-dimethylbicyclo[3.1.0]hex-2-en-2-yl))ethanone, with highly reactive alkyl halides (methyl iodide, benzyl halides, and allyl halides) in a two-phase system benzene-40% aqueous NaOH in the presence of benzyltriethylammonium chloride (BTEA) as phase-transfer catalyst results in formation of stable b-diketone monoimines, derivatives of the series of 1-((1R,5R)-2-alkyl-3-imino-6,6-dimethylbicyclo[3.1.0]hex-2-yl)ethanone, in 53-81% yields.

Alkylation of sterically hindered 1,3-diketones under phase-transfer conditions

A. S. Zanina; S. I. Shergina; I. E. Sokolov; M. S. Shvartsberg

Source details: Russ.Chem.Bl. 1996, 45 : 10 2389-2392.

Document type: Journal

CODEN: RCBUEY

Language: EN

CNR: 6056087

Original Source: Izv.Akad.Nauk Ser.Khim. 1996, 10 2518-2521.

CODEN: IASKEA

Language: RU

Abstract

Sterically hindered 1,3-diketones react selectively with propargyl and allyl bromides under conditions of phase transfer catalysis to give C-alkylated products, whereas reactions with butyl and benzyl chlorides yield mixtures of C- and O-isomers.An increase in the size of the substituents present in the initial 1,3-diketone hampers introduction of the second propargyl group.The propargyl-substituted 1,3-diketones undergo cyclization under the alkylation conditions to give substituted furans.

Sequence of alkylation of cyclohexane-1,3-dione. Alternative synthesis of (+/-)-angustione

A. A. Zenyuk; L. G. Lis; L. I. Ukhova

Source details: Chem.Nat.Compd.(Engl.Transl.) 1991, 27 : 4 400-403.

Document type: Journal

CODEN: CHNCA8

Language: EN

CNR: 5645800

Original Source: Khim.Prir.Soedin. 1991, 4 460-463.

CODEN: KPSUAR

Language: RU