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77093-99-3

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77093-99-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 77093-99-3 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,7,0,9 and 3 respectively; the second part has 2 digits, 9 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 77093-99:
(7*7)+(6*7)+(5*0)+(4*9)+(3*3)+(2*9)+(1*9)=163
163 % 10 = 3
So 77093-99-3 is a valid CAS Registry Number.

77093-99-3Downstream Products

77093-99-3Relevant articles and documents

Reactions of o-Aminonitriles with Isocyanates. 1. A Two-Step Synthesis of 2,6-Dihydroimidazoquinazolin-5-(3H)one

Papadopoulos, Eleftherios Paul

, p. 1553 - 1558 (2007/10/02)

The reaction of anthranilonitrile with 2-chloroethyl isocyanate yields 2-benzonitrile (6) which, upon heating, or treatment with base, undergoes a double cyclization to form 2,6-dihydroimidazoquinazolin-5-(3H)one (8) in excellent yield.When heated with hydrochloric acid, 6 is converted initially into 2-(2-chloroethylamino)-4H-benzoxazin-4-one (18) and further into 3-(2-chloroethyl)-2,4-(1H,3H)quinazolinedione (15).The acid-catalyzed reaction of 2,3-dihydro-5H-oxazoloquinazolin-5-one (14) with nucleophilic reagents yields 3-substituted 2,4-(1H,3H)quinazolinediones.

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