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21855-80-1

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21855-80-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 21855-80-1 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,1,8,5 and 5 respectively; the second part has 2 digits, 8 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 21855-80:
(7*2)+(6*1)+(5*8)+(4*5)+(3*5)+(2*8)+(1*0)=111
111 % 10 = 1
So 21855-80-1 is a valid CAS Registry Number.

21855-80-1Relevant articles and documents

Solid phase synthesizing method of dihydronaphthalene compound

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Paragraph 0052, (2016/10/10)

A solid phase synthesizing method of a dihydronaphthalene compound I belongs to the field of organic chemistry and comprises: 1, using 1% crosslinked polystyrene resin as a carrier to prepare a polystyrene-loaded selenium base succinimide reagent III; 2, under catalyzing of fluoroform sulfonic acid trimethyl estersil, using the III to induce olefin V to be subjected to intramolecular cyclization to form 3-polystyrene-loaded selenium base-1,2,3,4-tetrahydronaphthalene VI; 3, removing VI by an oxidant through oxidation without further separating, thereby directly obtaining dihydronaphthalene I. Raw materials are easy to obtain, the product yield is good, the purity is high, the operation is simple and convenient, the posttreatment is simple and the method has well industrial application prospect.

Cu-catalyzed intramolecular hydroarylation of alkynes

Wang, Yun-Long,Zhang, Wen-Man,Dai, Jian-Jun,Feng, Yi-Si,Xu, Hua-Jian

, p. 61706 - 61710 (2015/02/19)

An efficient Cu-catalyzed intramolecular hydroarylation reaction of alkynes has been developed. The reaction is accomplished under mild conditions and shows good tolerance to both electron-rich and electron-deficient aryl nucleophiles. A series of aryl, h

A one-pot preparation of aryl- and heteroarylcycloalkenes: Application to the total synthesis of (±)-laurokamurene B

Tallineau, Jean,Bashiardes, Georges,Coustard, Jean-Marie,Lecornué, Frédéric

experimental part, p. 2761 - 2764 (2010/03/03)

A general one-pot method has been developed for the preparation of various aryl- and heteroarylcycloalkenes. After lithiation of aryl and heteroaryl bromides followed by transmetalation with CeCl3, the organocerium addition to cycloalkanones proceeds clea

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