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143840-61-3

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143840-61-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 143840-61-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,4,3,8,4 and 0 respectively; the second part has 2 digits, 6 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 143840-61:
(8*1)+(7*4)+(6*3)+(5*8)+(4*4)+(3*0)+(2*6)+(1*1)=123
123 % 10 = 3
So 143840-61-3 is a valid CAS Registry Number.

143840-61-3Relevant articles and documents

Asymmetric synthesis of (-)-leiocarpin A via (-)-(S)-goniothalamin employing Julia-Kocienski olefination

Meruva, Suresh Babu,Raghavendra Rao,Mohammed, Aaseef,Dahanukar, Vilas H.,Kumar, U. K. Syam,Dubey

supporting information, p. 187 - 196 (2016/02/23)

A concise and enantioselective syntheses of antileukemic natural products such as (-)-(S)-goniothalamin and (-)-leiocarpin A has been accomplished in excellent yields. By employing reported conditions on suitable substrates via Julia-Kocienski olefination

Synthesis of an artificial HMG-CoA reductase inhibitor NK-104 via a hydrosilylation-cross-coupling reaction

Takahashi,Minami,Ohara,Hiyama

, p. 2649 - 2656 (2007/10/03)

The hydrosilylation of t-butyl (3R,5S)-3,5-isopropylidenedioxy-6-heptynoate with ClMe2SiH and a platinum catalyst, t-Bu3P·Pt(CH2 = CHSiMe2)2O, gave an (E)-vinylsilane in high yield with high regioselectivity. A subsequent cross-coupling reaction with an aryl halide afforded t-butyl (3R,5S,6E)-7-aryl-3,5-isopropylidene-dioxy-6-heptenoate. This sequence was applied to the synthesis of a potent HMC-CoA reductase inhibitor, NK-104.

New chiral blocks for introducing the side chain of HMG-CoA reductase inhibitors

Urabe,Matsuka,Sato

, p. 4183 - 4186 (2007/10/02)

A couple of versatile building blocks (8 and 9) of the side chain portion found in many HMG-CoA reductase inhibitors have been prepared. The successful introduction of the side chain to an aromatic ring by 8 or 9 has been demonstrated.

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