3685-23-2Relevant articles and documents
Preparation method of trans 4 - (tert-butyloxycarbonylamino) cyclohexanecarboxylic acid and intermediate thereof
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, (2021/09/21)
The invention provides a preparation method of trans 4 - (tert-butyloxycarbonylamino) cyclohexanecarboxylic acid and an intermediate thereof. The preparation method is characterized by comprising the following steps of 4 - oxocyclohexane carboxylic ester and chiral ligand reagent tert-butyl sulfinamide as a raw material, reducing amination to obtain trans -4 -tert-butyl sulfinyl sulfenamide cyclohexane carboxylic acid ester by virtue of chiral ligand reagent tert-butyl sulfinamide and 4 - 95% -oxocyclohexane carboxylic ester, and is stable in basic conditions and easy to leave under an acidic condition. Reaction conditions are mild, operation is simple and convenient, yield is high, and industrial production is easy.
NOVEL MULTIMERIC MOLECULES, A PROCESS FOR PREPARING THE SAME AND THE USE THEREOF FOR MANUFACTURING MEDICINAL DRUGS
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, (2010/06/16)
The invention relates to a compound of the formula (I): in which k and j are independently 0 or 1, Y is a macrocycle in which the cycle includes 9 to 36 carbon atoms and is functionalised by three amino functions and by a chain for attaching the spacer arm Z via an X bond, Rc is a binding pattern with a receptor of the TNF superfamily, X is a chemical function for binding the Y group to the space arm, and Z is a bi-, tri- or tetra-functional spacer arm.
An improved preparation of 2-azabicyclo[2.2.2]octane
Chung, John Y. L.,Ho, Guo-Jie
, p. 1985 - 1995 (2007/10/03)
An improved preparative four-step synthesis to isoquinuclidine tosylate salt 4 has been demonstrated in 70% overall yield from p-aminobenzoic acid (PABA) 1. Hydrogenation of PABA 1 affords 4-aminocyclohexane carboxylic acid 2 as an 80 : 20 mixture of cis- and trans-isomers. Heating the mixture at 250°C effected epimerization and cyclization to provide the bicyclic lactam 3. Subsequent Red-A1 reduction and treatment with tosic acid furnished the desired bicyclic amine, tosylate salt 4.