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1609939-18-5

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1609939-18-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1609939-18-5 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,6,0,9,9,3 and 9 respectively; the second part has 2 digits, 1 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 1609939-18:
(9*1)+(8*6)+(7*0)+(6*9)+(5*9)+(4*3)+(3*9)+(2*1)+(1*8)=205
205 % 10 = 5
So 1609939-18-5 is a valid CAS Registry Number.

1609939-18-5Downstream Products

1609939-18-5Relevant articles and documents

Trifluoroacetic acid-promoted Michael addition-cyclization reactions of vinylogous carbamates

Naganaboina, Ram Tilak,Nayak, Amrita,Peddinti, Rama Krishna

supporting information, p. 3366 - 3370 (2014/05/20)

A simple and efficient methodology has been developed for the synthesis of pyrrolobenzoxazine and 3-arylamino coumarin derivatives promoted by trifluoroacetic acid. The initial step in the current protocol involves a Michael addition of the 1,4-benzoxazinone derivatives, a novel class of vinylogous carbamates to the Michael acceptors and subsequent cyclization. the Partner Organisations 2014.

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