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136773-71-2

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136773-71-2 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 136773-71-2 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,6,7,7 and 3 respectively; the second part has 2 digits, 7 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 136773-71:
(8*1)+(7*3)+(6*6)+(5*7)+(4*7)+(3*3)+(2*7)+(1*1)=152
152 % 10 = 2
So 136773-71-2 is a valid CAS Registry Number.

136773-71-2Downstream Products

136773-71-2Relevant articles and documents

Highly diastereoselective synthesis of 3-methylenetetrahydropyrans by palladium-catalyzed oxa-[4 + 2] cycloaddition of 2-alkenylbenzothiazoles

Ni, Qijian,Song, Xiaoxiao,Xu, Lei

, p. 6617 - 6621 (2020/09/21)

A highly diastereoselective synthesis of 3-methylenetetrahydropyrans via palladium-catalyzed oxa-[4 + 2] cycloaddition of 2-alkenylbenzothiazoles with allyl carbonates bearing a nucleophilic alcohol side chain is presented. This synthetic methodology tolerates a wide variety of 2-alkenylbenzothiazoles and afforded the desired 3-methylenetetrahydropyrans in good yields and excellent dr. In addition, further derivatizations resulted in new scaffolds, making them useful synthetic precursors.

UNCATALYZED KNOEVENAGEL CONDENSATION OF 2-CYANOMETHYLBENZOTHIAZOLE WITH AROMATIC ALDEHYDES. PREPARATION OF 3-ARYL-2-(2-BENZOTHIAZOLYL)-ACRYLONITRILES AND 3-(2-BENZOTHIAZOLYL)-COUMARIN IMINES

Dryanska, Veneta

, p. 325 - 329 (2007/10/02)

A series of 3-aryl-2-(2-benzothiazolyl)-acrylonitriles (3a-n) and 3-(2-benzothiazolyl)-coumarin imines (5a-f) are prepared in good to high yields by refluxing solutions of 2-cyanomethylbenzothiazole (1) and aromatic aldehydes (2, 4) in ethanol. Key words:

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