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221380-88-7

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221380-88-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 221380-88-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,2,1,3,8 and 0 respectively; the second part has 2 digits, 8 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 221380-88:
(8*2)+(7*2)+(6*1)+(5*3)+(4*8)+(3*0)+(2*8)+(1*8)=107
107 % 10 = 7
So 221380-88-7 is a valid CAS Registry Number.

221380-88-7Downstream Products

221380-88-7Relevant articles and documents

Total synthesis of brevetoxin A: Part 3: Construction of GHIJ and BCDE ring systems

Nicolaou,Shi, Guo-Qiang,Gunzner, Janet L.,Gaertner, Peter,Wallace, Paul A.,Ouellette, Michael A.,Shi, Shuhao,Bunnage, Mark E.,Agrios, Konstantinos A.,Veale, Chris A.,Hwang, Chan-Kou,Hutchinson, John,Prasad,Ogilvie, William W.,Yang, Zhen

, p. 628 - 645 (2007/10/03)

Successful syntheses of highly complex intermediates 2 (GHIJ ring system) and 3 (BCDE ring system) for the total synthesis of brevetoxin A (1) are described. Several of our methodologies were utilized to achieve this goal: i) hydroxy epoxide cyclizations

Stereocontrolled Synthesis of the Hemibrevetoxin Ring System via an Allylic Tin Method

Kadota, Isao,Matsukawa, Yasuhisa,Yamamoto, Yoshinori

, p. 1638 - 1641 (2007/10/02)

Stereocontrolled synthesis of the 7,7,6,6-tetracyclic ether skeleton of the hemibrevetoxin skeleton has been accomplished via the intramolecular allylic tin-aldehyde and ketone) condensation.

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