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129822-44-2

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129822-44-2 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 129822-44-2 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,2,9,8,2 and 2 respectively; the second part has 2 digits, 4 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 129822-44:
(8*1)+(7*2)+(6*9)+(5*8)+(4*2)+(3*2)+(2*4)+(1*4)=142
142 % 10 = 2
So 129822-44-2 is a valid CAS Registry Number.

129822-44-2Relevant articles and documents

Preparation of indoles and oxindoles from N-(tert-butoxycarbonyl)-2-alkylanilines

Clark,Muchowski,Fisher,Flippin,Repke,Souchet

, p. 871 - 878 (2007/10/02)

Treatment of dilithiated N-(tert-butoxycarbonyl)anilines 1 with dimethylformamide or carbon dioxide furnishes intermediates 3, 5, that are easily converted to N-(tert-butoxycarbonyl)indoles 4 and oxindoles (indol-2(3H)-ones, 7), respectively. Condensation of dilithiated 1 with N-methoxy-N-methylamides provides ketones 9 which are cyclized upon trifluoroacetic acid treatment to either 2-substituted 1-(tert-butoxycarbonyl)indoles 10 or 2-substituted indoles 11 depending on the reaction time. This general methodology has been applied to efficient synthesis of 1,2-alkyl-bridged indoles 12, 1,3,4,5-tetrahydrobenz[c,d]indole (16), 2a,3,4,5-tetrahydrobenz[c,d]indol-2(1H)-one (18), and 1-(tert-butoxycarbonyl)1H-pyrrolo[2,3-b]pyridine (21).

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