Preparation of new layered double hydroxides exchanged with diisopropylamide for C-C bond forming reactions
AssigneeCouncil of Industrial Research
InventorsBoyapati Manoranjan Choudary, Aduri Ravindra, Mannepalli Lakshmi Kantam, Chinta Reddy Venkat Reddy, Balagam Bharathi
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Abstract
The present invention relates to design and preparation of LDH-diisopropylamide through simple exchange process for the first time and its use in catalytic amounts for preparing aldols/α,β-unsaturated nitriles/α,β-unsaturated esters/transesterified products/β-nitroalkanols/Michael adducts and epoxide, resulting in higher yields.
Claims20
A process for the preparation of Layered double hydroxide exchanged with diisopropylamide catalyst of formula (1) which is referred to as LDH-diisopropylamide catalyst and represented herein below:
- [MI and/or MII(1−x)MIII(x)(OH}2] [NCH(CH3)2−]x/2.zH2O.
- wherein
- MI is a monovalent cation
- MII is a bivalent cation
- MIII is a trivalent cation
- x=0.10 to 0.50
- z is an integer whose value depends on the ingredients and the reaction conditions used,
- the said process comprising steps of:
- (a) reacting layered double hydroxide of general formula (2) [MI and/or MII(1−x)MIII(x)(OH}2] [An−]x/2.zH2O with lithium diisopropylamide in an organic solvent under an inert atmosphere of nitrogen at a temperature ranging between 20°-30° C. for a period of 5 to 24 hours, and
- (b) filtering the reaction mixture of step (a) to obtain the required layered double hydroxide exchanged with diisopropylamide catalyst of general formula (1), referred to as LDH-diisopropylamide cartalyst.
Dependencies are inferred from the claim text.