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842150-42-9

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842150-42-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 842150-42-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 8,4,2,1,5 and 0 respectively; the second part has 2 digits, 4 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 842150-42:
(8*8)+(7*4)+(6*2)+(5*1)+(4*5)+(3*0)+(2*4)+(1*2)=139
139 % 10 = 9
So 842150-42-9 is a valid CAS Registry Number.

842150-42-9Relevant articles and documents

An expedient and short synthesis of a 6-iodo isocoumarin building block for the rubromycin family and its first palladium-catalyzed couplings

Brasholz, Malte,Reissig, Hans-Ulrich

, p. 2736 - 2738 (2004)

An efficient six-step synthesis of 6-iodo substituted isocoumarin 6 is presented, which is a suitable building block for the preparation of rubromycin type compounds. Key transformations of the sequence were achieved by directed ortho-lithiation, Horner-W

Towards the rubromycins: An efficient synthesis of a suitable isocoumarin precursor, its lactam analogue, and palladium-catalyzed couplings

Brasholz, Malte,Luan, Xiaosong,Reissig, Hans-Ulrich

, p. 3571 - 3580 (2007/10/03)

6-Iodoisocoumarin 4 and its aza-analogue, 6-iodo-1-oxo-isoquinoline 29, were efficiently prepared from vanillin in seven and six steps, respectively. Key transformations in their syntheses were achieved by directed ortho-lithiation and variations of Horne

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