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263887-30-5

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263887-30-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 263887-30-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,6,3,8,8 and 7 respectively; the second part has 2 digits, 3 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 263887-30:
(8*2)+(7*6)+(6*3)+(5*8)+(4*8)+(3*7)+(2*3)+(1*0)=175
175 % 10 = 5
So 263887-30-5 is a valid CAS Registry Number.

263887-30-5Relevant articles and documents

Cascade Synthesis of 3-Alkylidene Dihydrobenzofuran Derivatives via Rhodium(III)-Catalyzed Redox-Neutral C-H Functionalization/Cyclization

Zhou, Zhi,Liu, Guixia,Chen, Yan,Lu, Xiyan

, p. 5874 - 5877 (2015)

An efficient rhodium(III)-catalyzed coupling reaction of N-phenoxyacetamides with propargyl carbonates to yield 3-alkylidene dihydrobenzofuran derivatives via C-H functionalization/cascade cyclization has been developed. This transformation represents a r

Rhodium(III)-catalyzed redox-neutral coupling of N-phenoxyacetamides and alkynes with tunable selectivity

Liu, Guixia,Shen, Yangyang,Zhou, Zhi,Lu, Xiyan

, p. 6033 - 6037 (2013/07/19)

Give it a tweak: A novel oxidizing directing group was developed for a rhodium(III)-catalyzed C-H functionalization of N-phenoxyacetamides with alkynes. A small change in the reaction conditions leads to either ortho-hydroxyphenyl-substituted enamides or cyclization to deliver benzofurans with high selectivity (see scheme; Cp=C5Me5). Copyright

Synthesis of 2,3-disubstituted benzofurans by platinum olefin-catalyzed carboalkoxylation of o-alkynylphenyl acetals

Nakamura, Itaru,Mizushima, Yuya,Yamamoto, Yoshinori

, p. 15022 - 15023 (2007/10/03)

The PtCl2-catalyzed cyclization reaction of o-alkynylphenyl acetals 1 in the presence of 1,5-cyclooctadiene produces 3-(α-alkoxyalkyl)benzofurans 2 in good to high yields. For example, the reaction of acetaldehyde ethyl 2-(1-octynyl)phenyl acetal (1a), acetaldehyde ethyl 2-(cyclohexylethynyl)phenyl acetal (1c), and acetaldehyde ethyl 2-(phenylethynyl)phenyl acetal (1f) in the presence of 2 mol % of platinum(II) chloride and 8 mol % of 1,5-cyclooctadiene in toluene at 30 °C gave the corresponding 2,3-disubstituted benzofurans 2a, 2c, and 2f in 91, 94, and 88% yields, respectively. Copyright

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