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90314-47-9

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90314-47-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 90314-47-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,0,3,1 and 4 respectively; the second part has 2 digits, 4 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 90314-47:
(7*9)+(6*0)+(5*3)+(4*1)+(3*4)+(2*4)+(1*7)=109
109 % 10 = 9
So 90314-47-9 is a valid CAS Registry Number.

90314-47-9Downstream Products

90314-47-9Relevant articles and documents

Reaction of Grignard reagents with α-epoxycyclopentanones. II. The opening of the oxirane ring

Sepulveda, Jose,Soto, Salvador,Mestres, Ramon

, p. 237 - 239 (2007/10/02)

By reaction of ethyl-, vinyl- and ethynylmagnesium bromides with 2,3-epoxycyclopentanone 1 at -70 deg C and heating of the reaction mixture at 40 deg C, the epoxycyclopentanols 3 were obtained only in trace amounts, whereas the bromodiols 5 formed in higher than 75percent isolated yields.The presence of cis-vicinal diol in all bromodiols is clear from the obtention of O-isopropylidene derivatives 6.In the same conditions as for epoxycyclopentanone 1, the epoxyketone 2 reacted in a much different way, giving hydroxycyclopentanones 7 (50-60percent), cyclopentendiols 8 (18-37percent) and methylidenecyclopentanediols 9 (small to trace amounts).When an excess of the ethyl- or ethynylmagnesium bromide was used, epoxycyclopentanone 2 gave the dialkyldiols 10a (58percent) and 10c (62percent).The configuration of the cyclopentenediol 8a was determined by preparation of the O-isopropylidene derivative.For the other products we have made the assignment taking into account negative experiments and mechanistic considerations.

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