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73902-05-3

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73902-05-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 73902-05-3 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,3,9,0 and 2 respectively; the second part has 2 digits, 0 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 73902-05:
(7*7)+(6*3)+(5*9)+(4*0)+(3*2)+(2*0)+(1*5)=123
123 % 10 = 3
So 73902-05-3 is a valid CAS Registry Number.

73902-05-3Upstream product

73902-05-3Downstream Products

73902-05-3Relevant articles and documents

Acid-catalyzed rearrangement of cyclobutanones. V. Preparation of polycyclic aromatic dihydrofurans and dihydropyrans

Duperrouzel, Paul,Lee-Ruff, Edward

, p. 51 - 54 (2007/10/02)

Cyclobutanones derived from α-phenyl, α,α-diphenyl, and bisphenyleneketene cycloaddition to dihydrofuran and dihydropyran were rearranged under acidic conditions to polycyclic aromatic dihydrofurans and dihydropyrans ,respectively.A mechanism for these rearrangements is proposed.

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