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225943-16-8

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225943-16-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 225943-16-8 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,2,5,9,4 and 3 respectively; the second part has 2 digits, 1 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 225943-16:
(8*2)+(7*2)+(6*5)+(5*9)+(4*4)+(3*3)+(2*1)+(1*6)=138
138 % 10 = 8
So 225943-16-8 is a valid CAS Registry Number.

225943-16-8Upstream product

225943-16-8Downstream Products

225943-16-8Relevant articles and documents

Thionation of ω-hydroxy amides with Lawesson's reagent: Synthesis of thioenamides and sulfur-containing heterocycles

Nishio, Takehiko,Sekiguchi, Hiroshi

, p. 5017 - 5026 (2007/10/03)

The thionation of ω-hydroxy amides with Lawesson's reagent [LR: 2,4- bis(p-methoxyphenyl)-1,3,2,4-dithiaphosphetane-2,4-disulfide] is described. The treatment of 3-hydroxy amides 1 with LR exclusively gave thioenamides 2 in fair yields. The treatment of 4-hydroxy amides 5 with LR yielded sulfur- containing heterocycles such as tetrahydrothiophene-2-imines 6 and tetrahydrothiophene-2-thione 7a through cyclization of intermediates, 4- mercapto amides 8. The 5-hydroxy amides 13 also reacted with LR to afford tetrahydrothiopyrane-2-thione 14 as the the sole product.

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