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36229-72-8

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36229-72-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 36229-72-8 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 3,6,2,2 and 9 respectively; the second part has 2 digits, 7 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 36229-72:
(7*3)+(6*6)+(5*2)+(4*2)+(3*9)+(2*7)+(1*2)=118
118 % 10 = 8
So 36229-72-8 is a valid CAS Registry Number.

36229-72-8Relevant articles and documents

Isoacenofuran: A novel quinoidal building block for efficient access to high-ordered polyacene derivatives

Kitamura, Kei,Kudo, Ryoji,Sugiyama, Haruki,Uekusa, Hidehiro,Hamura, Toshiyuki

supporting information, p. 14988 - 14991 (2020/12/23)

Herein, a simple and practical method for generating isoacenofuran, a new π-extended quinoidal building block, was developed. A three-step protocol involving double nucleophilic additions of alkynyllithiums to acene-2,3-dicarbaldehyde, mono-oxidation, and acid-promoted cyclization enables the generation of the target molecule, which is trapped by a dienophile to produce highly condensed acenequinones. Further transformations by double nucleophilic additions of alkynyllithium to hexacenequinone, followed by reductive aromatization, produce tetraalkynylhexacenes with a remarkably higher stability than that of the previously reported substituted hexacenes.

Gold-catalyzed cascade cycloisomerization of 1,7-diyn-3,6-bis(propargyl carbonate)s: Stereoselective synthesis of naphtho[b]cyclobutenes

Chen, Ming,Liu, Jun,Wang, Lu,Zhou, Xiaobo,Liu, Yuanhong

supporting information, p. 8650 - 8652 (2013/09/23)

Gold-catalyzed cycloisomerization of 1,7-diyn-3,6-bis(propargyl carbonate)s leads to a highly efficient and diastereoselective synthesis of functionalized naphtho[b]cyclobutenes. A cascade sequence involving gold-catalyzed double 3,3-rearrangement, 6π-electrocyclic reaction and a decarbonylative cyclization was proposed for this reaction.

Highly efficient Bronsted acid-catalyzed cycloisomerizations of alkynes bearing bis(acetoxy) groups to indenyl ketones

Liu, Yuanhong,Zhou, Shaolin,Li, Guijie,Yan, Bin,Guo, Shenghai,Zhou, Yebing,Zhang, Hao,Wang, Peng George

supporting information; body text, p. 797 - 801 (2009/04/08)

A Bronsted acid-catalyzed cycloisomerization of functionalized alkynes is described, which is assumed to be initiated through the formation of a benzylic cation intermediate. The reaction offers a highly efficient and straightforward route to indenyl ketones with a wide range of substituents under mild conditions.

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