ChemicalBook CAS DataBase List methyl 3-[3-tert-butyl-4-hydroxy-5-(5-chloro-2H-benzotriazol-2-yl)phenyl]propionate

methyl 3-[3-tert-butyl-4-hydroxy-5-(5-chloro-2H-benzotriazol-2-yl)phenyl]propionate synthesis

1synthesis methods

Product Name:methyl 3-[3-tert-butyl-4-hydroxy-5-(5-chloro-2H-benzotriazol-2-yl)phenyl]propionate
CAS Number:83044-91-1
Molecular formula:C20H22ClN3O3
Molecular Weight:387.86

67-56-1 Synthesis

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Benzenepropanoic acid, 3-(5-chloro-2H-benzotriazol-2-yl)-5-(1,1-dimethylethyl)-4-hydroxy-

83573-67-5
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methyl 3-[3-tert-butyl-4-hydroxy-5-(5-chloro-2H-benzotriazol-2-yl)phenyl]propionate

83044-91-1
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Yield:83044-91-1 93%

Reaction Conditions:

with sulfuric acid for 4 h;Reflux;

Steps:

1.H

Example 1H Synthesis of 2-(5-chloro-2H-benzotriazol-2-yl)-6-tert-butyl-4-hydroxyphenylpropionic acid methyl ester (14) To a suspension of 37.4 g (0.1 mol) of (13) in 0.75 l of methanol were added 5 ml of 98% strength sulfuric acid followed by stirring under reflux for 4 hours. The suspension was filtered and the product was washed with methanol to obtain, when dried, 36 g of a white powder (14) (yield=93%).

References:

US2012/58974,2012,A1 Location in patent:Page/Page column 9