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3227-90-5

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3227-90-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 3227-90-5 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 3,2,2 and 7 respectively; the second part has 2 digits, 9 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 3227-90:
(6*3)+(5*2)+(4*2)+(3*7)+(2*9)+(1*0)=75
75 % 10 = 5
So 3227-90-5 is a valid CAS Registry Number.
InChI:InChI=1/C6H6/c1-4-5(2)6(4)3/h1-3H2

3227-90-5Downstream Products

3227-90-5Relevant articles and documents

Simple large-scale preparation of 1,2,3-tris-acceptor substituted cyclopropanes

Kozhushkov, Sergei I.,Leonov, Andrei,De Meijere, Armin

, p. 956 - 958 (2007/10/03)

Triethyl (1α,2α,3β)cyclopropane-1,2,3-tricarboxylate (3aa), as well as diethyl (4ab) and dimethyl (1α,2β,3α)-1-acetylcyclopropane-2,3-dicarboxylate (4bb) have been prepared on a scale of up to 60 g by Michael initiated ring-closure (MIRC) cyclopropanation of dialkyl fumarates 1a,b with ethyl chloroacetate (2a) and chloroacetone (2b) in 62%, 51% and 56% yield, respectively. For the success of the new procedure it is essential to slowly add (within 5-7 h) the mixture of compounds 1 and 2 to a vigorously stirred suspension of K2CO3 in DMF in the presence of benzyltriethylammonium chloride.

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