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121245-09-8

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121245-09-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 121245-09-8 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,2,1,2,4 and 5 respectively; the second part has 2 digits, 0 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 121245-09:
(8*1)+(7*2)+(6*1)+(5*2)+(4*4)+(3*5)+(2*0)+(1*9)=78
78 % 10 = 8
So 121245-09-8 is a valid CAS Registry Number.

121245-09-8Upstream product

121245-09-8Relevant articles and documents

Total synthesis of (-)-solanapyrone A via enzymatic Diels-Alder reaction of prosolanapyrone

Oikawa, Hideaki,Kobayashi, Tomonori,Katayama, Kinya,Suzuki, Yuichi,Ichihara, Akitami

, p. 8748 - 8756 (2007/10/03)

The syntheses of prosolanapyrones I (6) and II (7) via the aldol reactions of pyrone and dienal segments have been achieved in five steps in 31% overall yield for 6 and seven steps in 5% overall yield for 7. An improved synthetic route starting from vinylpyrone 27 provided 7 in 11 steps in 12% overall yield. The enzymatic Diels-Alder reaction of 7 affords (-)- solanapyrone A (1) with high enantioselectivity and with good exo- selectivity, which is difficult to attain by chemical methods. In addition, a crude enzyme preparation from Alternaria solani has been used to perform a kinetic resolution of (±)-3.

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