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173658-16-7

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173658-16-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 173658-16-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,7,3,6,5 and 8 respectively; the second part has 2 digits, 1 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 173658-16:
(8*1)+(7*7)+(6*3)+(5*6)+(4*5)+(3*8)+(2*1)+(1*6)=157
157 % 10 = 7
So 173658-16-7 is a valid CAS Registry Number.

173658-16-7Upstream product

173658-16-7Downstream Products

173658-16-7Relevant articles and documents

An efficient construction of 4-oxo-1,3-diazabicyclo[3.3.0]octanes via thiohydantoins

Kim,Yoo,Shin,Kim,Park

, p. 4001 - 4010 (2007/10/03)

New stereoisomeric N-bridged heterocycles, 4-oxo-1,3-diazabicyclo-[3.3.0]octanes (4) were synthesized from trans-4-hydroxy-L-proline (1). Thiohydantoins 3 as the key intermediates were prepared by nucleophilic addition of 1 to isothiocyanates, and subsequent cyclization. These thiohydantoins 3 were readily desulfurized to provide 4.

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