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1040140-83-7

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1040140-83-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1040140-83-7 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,0,4,0,1,4 and 0 respectively; the second part has 2 digits, 8 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 1040140-83:
(9*1)+(8*0)+(7*4)+(6*0)+(5*1)+(4*4)+(3*0)+(2*8)+(1*3)=77
77 % 10 = 7
So 1040140-83-7 is a valid CAS Registry Number.

1040140-83-7Downstream Products

1040140-83-7Relevant articles and documents

Asymmetric synthesis of a chiral buckybowl, trimethylsumanene

Higashibayashi, Shuhei,Sakurai, Hidehiro

, p. 8592 - 8593 (2008)

The first asymmetric synthesis of a chiral buckybowl, a C3 symmetric (C)-8,13,18-trimethylsumanene (1), was achieved by employing a synthetic strategy that translates chirality at sp3 centers into bowl chirality. The synthesis features a syn selective cyclotrimerization of an enantiopure halonorbornene derivative, tandem ring-opening/closing olefin metathesis reactions, and DDQ oxidation at low temperature. The bowl-to-bowl inversion energy of 1 was determined as 21.6 kcal/mol by circular dichroism spectra measurement. Copyright

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