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143392-20-5

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143392-20-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 143392-20-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,4,3,3,9 and 2 respectively; the second part has 2 digits, 2 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 143392-20:
(8*1)+(7*4)+(6*3)+(5*3)+(4*9)+(3*2)+(2*2)+(1*0)=115
115 % 10 = 5
So 143392-20-5 is a valid CAS Registry Number.

143392-20-5Relevant articles and documents

Cobalt-Catalyzed Vinylic C-H Addition to Formaldehyde: Synthesis of Butenolides from Acrylic Acids and HCHO

Yu, Shuling,Hong, Chao,Liu, Zhanxiang,Zhang, Yuhong

supporting information, p. 8359 - 8364 (2021/11/01)

A carboxyl-assisted C-H functionalization of acrylic acids with formaldehyde to give butenolides is described. It is the first time that the addition of an inert vinylic C-H bond to formaldehyde has been achieved via cobalt-catalyzed C-H activation. The unique reactivity of the cobalt species was observed when compared with related Rh or Ir catalysts. γ-Hydroxymethylated butenolides were produced by the treatment of Na2CO3 after the catalytic reaction in one pot.

A modular and scalable one-pot synthesis of polysubstituted furans

Fournier, Jeremy,Arseniyadis, Stellios,Cossy, Janine

supporting information; experimental part, p. 7562 - 7566 (2012/10/18)

One four all: Allyl dienol carbonates can be readily converted into diversely substituted furans by a one-pot four-step sequence featuring a palladium-catalyzed decarboxylative allylic alkylation, a microwave-mediated Cope rearrangement, a nucleophilic addition, and a dehydration reaction (see scheme). The protocol is operationally simple, highly flexible, and provides di-, tri-, and tetrasubstituted furans starting from readily available materials. Copyright

Reductive Carbonylation of Acetylenes under Water-Gas Shift Reaction Conditions. Synthesis of Furan-2(5H)-ones from Terminal and Non-substituted Acetylenes

Joh, Takashi,Nagata, Hiroyuki,Takahashi, Shigetoshi

, p. 1305 - 1308 (2007/10/02)

Under water-gas reaction conditions terminal and non-substituted acetylenes are selectively converted into furan-2(5H)-ones by catalysis with a rhodium carbonyl cluster.

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