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49740-42-3

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49740-42-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 49740-42-3 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 4,9,7,4 and 0 respectively; the second part has 2 digits, 4 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 49740-42:
(7*4)+(6*9)+(5*7)+(4*4)+(3*0)+(2*4)+(1*2)=143
143 % 10 = 3
So 49740-42-3 is a valid CAS Registry Number.

49740-42-3Downstream Products

49740-42-3Relevant articles and documents

Acylation and alkoxycarbonylation of benzoxazoline-2-thione and benzothiazoline-2-thione

Nishio, Takehiko,Shiwa, Kiyoko

, p. 313 - 324 (2007/10/03)

Acylation of benzoxazoline-2-thione (1) and benzothiazoline-2-thione (2) with acetic anhydride (3) and acyl chlorides (4) gave N-acyl (5, 6) and/or S-acyl (7, 8) derivatives depending on the nature of acylating agents and bases used. Alkoxycarbonylation of 1 with aralkyl chlorocarbonates (9) gave N-alkoxycarbonyl derivatives (10) mainly, while that of 2 with aralkyl chloroccarbonates (9) gave S-alkoxycarbonyl derivatives (12) exclusively. Photolysis of N-acyl derivatives (5 or 6) in the presence of alcohols afforded 1 or 2, respectively, together with esters (16).

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