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138504-32-2

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138504-32-2 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 138504-32-2 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,8,5,0 and 4 respectively; the second part has 2 digits, 3 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 138504-32:
(8*1)+(7*3)+(6*8)+(5*5)+(4*0)+(3*4)+(2*3)+(1*2)=122
122 % 10 = 2
So 138504-32-2 is a valid CAS Registry Number.

138504-32-2Relevant articles and documents

Stable 1H-Benzo[c]thio- and 1H-Benzo[c]selenophen-2-ium Tetrafluoroborates: Insight into Electronic Structures, Electrochemical Behavior, and Reactivity

Nagahora, Noriyoshi,Takemoto, Ikue,Fujii, Motomi,Shioji, Kosei,Okuma, Kentaro

, p. 2110 - 2113 (2017)

The synthesis of 1H-benzo[c]thio- and 1H-benzo[c]selenophen-2-ium tetrafluoroborates by the reaction of triphenylcarbenium tetrafluoroborate with 1-ethylidene-1,3-dihydrobenzo[c]thiophene or 1-ethylidene-1,3-dihydrobenzo[c]selenophene, respectively, is reported. The electronic structure of these novel 1H-benzo[c]chalcogenophenium salts was examined on the basis of their electronic spectra, whereby transitions were assigned in agreement with theoretical calculations. Electrochemical measurements revealed irreversible one-electron reduction waves for these 1H-benzo[c]chalcogenophenium salts.

Visible Light Induced Cyclization to Spirobi[indene] Skeletons from Functionalized Alkylidienecyclopropanes

Li, Quanzhe,Liu, Jiaxin,Shi, Min,Wei, Yin

, (2020/03/26)

In this paper, we revealed a metal-free and visible light photoinduced method for the rapid construction of spirobi[indene] skeletons, providing a simple and efficient way for easy access to spirobi[indene] scaffolds under mild conditions along with a broad substrate scope and good functional group tolerance.

Lewis or Br?nsted acid-catalysed reaction of propargylic alcohol-tethered alkylidenecyclopropanes with indoles and pyrroles for the preparation of polycyclic compounds tethered with indole or pyrrole motif

Wei, Hao-Zhao,Yu, Liu-Zhu,Shi, Min

, p. 135 - 139 (2019/12/26)

We developed a facile synthetic method to access cyclopenta[b]naphthalene derivatives via the Lewis or Br?nsted acid catalysed cascade nucleophilic addition, electronic cyclization, ring-opening rearrangement of propargylic alcohol-tethered alkylidenecyclopropanes with indole and pyrrole derivatives. The reaction exhibited a broad substrate scope and good functional group tolerance under metal-free conditions, affording the desired products in moderate to good yields.

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