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108665-93-6

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108665-93-6 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 108665-93-6 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,0,8,6,6 and 5 respectively; the second part has 2 digits, 9 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 108665-93:
(8*1)+(7*0)+(6*8)+(5*6)+(4*6)+(3*5)+(2*9)+(1*3)=146
146 % 10 = 6
So 108665-93-6 is a valid CAS Registry Number.

108665-93-6Relevant articles and documents

Raney nickel-induced 3-alkylation of oxindole with alcohols and diols

Volk, Balázs,Mezei, Tibor,Simig, Gyula

, p. 595 - 597 (2002)

New reaction conditions are described, which turn Wenkert's synthesis of 3-alkyloxindoles (Raney nickel-induced alkylation of oxindole with alcohols) into a reproducible and highly efficient synthetic tool. The method is also extended to the preparation o

Iron-Catalyzed Borrowing Hydrogen C-Alkylation of Oxindoles with Alcohols

Dambatta, Mubarak B.,Polidano, Kurt,Northey, Alexander D.,Williams, Jonathan M. J.,Morrill, Louis C.

, p. 2345 - 2349 (2019)

A general and efficient iron-catalyzed C-alkylation of oxindoles has been developed. This borrowing hydrogen approach employing a (cyclopentadienone)iron carbonyl complex (2 mol %) exhibited a broad reaction scope, allowing benzylic and simple primary and secondary aliphatic alcohols to be employed as alkylating agents. A variety of oxindoles underwent selective mono-C3-alkylation in good-to-excellent isolated yields (28 examples, 50–92 % yield, 79 % average yield).

New One-Pot Synthesis of 3-Alkyl- and 3-(ω-Hydroxyalkyl)oxindoles from Isatins

Volk, Balazs,Simig, Gyula

, p. 3991 - 3996 (2003)

A new and efficient one-pot procedure has been developed for the synthesis of 3-alkyl- and 3-(ω-hydroxyalkyl)oxindoles from isatins by treatment with alcohols and diols in the presence of Raney nickel, under hydrogen atmosphere. Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2003.

Rapid Oxidation Indoles into 2-Oxindoles Mediated by PIFA in Combination with n-Bu4NCl ? H2O

Liang, Peng,Zhao, Hang,Zhou, Tingting,Zeng, Kaiyun,Jiao, Wei,Pan, Yang,Liu, Yazhou,Fang, Dongmei,Ma, Xiaofeng,Shao, Huawu

supporting information, p. 3532 - 3538 (2021/06/09)

We report the development of a rapid approach for directly converting indoles into 2-oxindoles promoted by HOCl formed in situ from the combination of (bis(trifluoroacetoxy) iodo)benzene (PIFA) and n-Bu4NCl ? H2O. The procedure is widely functional group tolerant and provides 2-oxindoles in up to 95% yield within 5 min. The potential applications of the developed methodology are demonstrated by the gram-scale preparation of 3-methyl-2-oxindole (11 a), the one-pot two-step syntheses of spiro-oxindoles 26 a and 26 b, and the formal synthesis of (-)-folicanthine (2). (Figure presented.).

Harnessing Applied Potential: Selective β-Hydrocarboxylation of Substituted Olefins

Alkayal, Anas,Buckley, Benjamin R.,Malkov, Andrei V.,Montanaro, Stephanie,Tabas, Volodymyr,Wright, Iain A.

supporting information, (2020/02/13)

The construction of carboxylic acid compounds in a selective fashion from low value materials such as alkenes remains a long-standing challenge to synthetic chemists. In particular, β-addition to styrenes is underdeveloped. Herein we report a new electrosynthetic approach to the selective hydrocarboxylation of alkenes that overcomes the limitations of current transition metal and photochemical approaches. The reported method allows unprecedented direct access to carboxylic acids derived from β,β-trisubstituted alkenes, in a highly regioselective manner.

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