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128993-55-5

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128993-55-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 128993-55-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,2,8,9,9 and 3 respectively; the second part has 2 digits, 5 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 128993-55:
(8*1)+(7*2)+(6*8)+(5*9)+(4*9)+(3*3)+(2*5)+(1*5)=175
175 % 10 = 5
So 128993-55-5 is a valid CAS Registry Number.

128993-55-5Downstream Products

128993-55-5Relevant articles and documents

Coenzyme-inspired chemistry 1: The C-2 alkylation of 4,5-dihydroimidazoles

Jones, Raymond C.F.,Nichols, John R.

, p. 4114 - 4119 (2013/06/27)

Alkylation of 4,5-dihydroimidazoles at C-2 is accomplished using a double umpolung of the reactivity of that position, via sulfenylation of a nucleophilic C-2 lithio-species and substitution using an alkyl nucleophile. Arylation via unexpected sulfide con

2-Methyl-4,5-dihydroimidazole as a Doubly Nucleophilic Unit: Preparation of Dihydroimidazole Azaprostanoids

Jones, Raymond C. F.,Schofield, Julie

, p. 375 - 383 (2007/10/02)

2-Methyl-4,5-dihydroimidazole is incorporated as a doubly nucleophilic synthon, by successive alkylations at N-1 and C-2(Me), into monocyclic 9,12- and 8,11-diazaprostanoids containing the dihydroimidazole moiety. 2-Methyl-3a,4,7,7a-tetrahydrobenzimidazole is prepared (from 1,2,3,6-tetrahydrophthalic anhydride) and elaborated in the same way into a diazaprostacyclin precursor.

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