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127756-72-3

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127756-72-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 127756-72-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,2,7,7,5 and 6 respectively; the second part has 2 digits, 7 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 127756-72:
(8*1)+(7*2)+(6*7)+(5*7)+(4*5)+(3*6)+(2*7)+(1*2)=153
153 % 10 = 3
So 127756-72-3 is a valid CAS Registry Number.

127756-72-3Downstream Products

127756-72-3Relevant articles and documents

Acyloxylation at the 4-Position of Azetidin-2-ones

Easton, Christopher J.,Love, Stephen G.,Wang, Peng

, p. 277 - 282 (2007/10/02)

The copper-catalysed reaction of azetidin-2-ones with t-butyl perbenzoate or peracetate affords the corresponding 4-benzoyloxy- and acetoxy-substituted β-lactams, respectively.N-Unsubstituted 4-acyloxyazetidinones can be synthesized by dearylation of the N-(4-methoxyphenyl)-substituted products with ceric ammonium nitrate.Acyloxylation of β-lactams that are monosubstituted at C-3 affords predominantly trans-products.

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