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1028432-87-2

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1028432-87-2 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1028432-87-2 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,0,2,8,4,3 and 2 respectively; the second part has 2 digits, 8 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 1028432-87:
(9*1)+(8*0)+(7*2)+(6*8)+(5*4)+(4*3)+(3*2)+(2*8)+(1*7)=132
132 % 10 = 2
So 1028432-87-2 is a valid CAS Registry Number.

1028432-87-2Relevant academic research and scientific papers

Total synthesis of (-)-brevenal: A streamlined strategy for practical synthesis of polycyclic ethers

Ebine, Makoto,Fuwa, Haruhiko,Sasaki, Makoto

, p. 13754 - 13761 (2012/01/06)

We describe a streamlined strategy for the practical synthesis of trans-fused polycyclic ethers and its application to a concise total synthesis of (-)-brevenal, a new pentacyclic polyether natural product with intriguing biological activities. The B-, D-, and E-rings were constructed by TEMPO/PhI(OAc)2-mediated oxidative lactonization of the corresponding 1,6-diols, with minimal need for manipulation of oxygen functionalities. The B- and E-ring lactones were appropriately functionalized by Suzuki-Miyaura coupling of lactone-derived enol phosphates and subsequent stereoselective hydroboration. The A-ring was formed by our mixed thioacetalization methodology. The AB- and DE-ring fragments were assembled through Suzuki-Miyaura coupling, and the C-ring was forged in the same manner as that for the A-ring. More than two grams of the pentacyclic polyether core of (-)-brevenal have been synthesized by the synthetic route developed in this study.

Total synthesis of (-)-brevenal: A concise synthetic entry to the pentacyclic polyether core

Ebine, Makoto,Fuwa, Haruhiko,Sasaki, Makoto

supporting information; experimental part, p. 2275 - 2278 (2009/05/11)

(Chemical Equation Presented) Total synthesis of (-)-brevenal, a novel marine polycyclic ether natural product, is described. Highly efficient and scalable entries to the AB-ring exo-olefin and the DE-ring enol phosphate and a rapid construction of the C-

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