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77666-79-6

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77666-79-6 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 77666-79-6 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,7,6,6 and 6 respectively; the second part has 2 digits, 7 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 77666-79:
(7*7)+(6*7)+(5*6)+(4*6)+(3*6)+(2*7)+(1*9)=186
186 % 10 = 6
So 77666-79-6 is a valid CAS Registry Number.

77666-79-6Downstream Products

77666-79-6Relevant articles and documents

Acid Chloride Synthesis by the Palladium-Catalyzed Chlorocarbonylation of Aryl Bromides

Quesnel, Jeffrey S.,Kayser, Laure V.,Fabrikant, Alexander,Arndtsen, Bruce A.

, p. 9550 - 9555 (2015)

We report a palladium-catalyzed method to synthesize acid chlorides by the chlorocarbonylation of aryl bromides. Mechanistic studies suggest the combination of sterically encumbered PtBu3 and CO coordination to palladium can rapidly equilibrate the oxidative addition/reductive elimination of carbon-halogen bonds. This provides a useful method to assemble highly reactive acid chlorides from stable and available reagents, and can be coupled with subsequent nucleophilic reactions to generate new classes of carbonylated products. The Good, the Bad and the Bulky! By employing a sterically encumbered phosphine ligand, tri-tert-butyl phosphine, under palladium catalysis inert aryl bromides are chlorocarbonylated to create reactive acid chlorides by reversible carbon-halogen bond reductive elimination. This general platform allows for an expanded scope of the Heck carbonylation reaction to include previously incompatible nucleophiles.

Preparation method for synthesizing ester compound by using N-Boc amide as raw material

-

Paragraph 0020; 0021, (2019/03/28)

The invention relates to a preparation method for synthesizing an ester compound by using N-Boc amide as a raw material. According to the method, an inorganic base is used as a catalyst; the N-Boc amide is subjected to an intermolecular nucleophilic substitution reaction with various alcohol compounds; and various ester compounds can be efficiently obtained. The method has the advantages of beingmild in reaction condition, simple and convenient to operate, high in yield and favorable in functional-group compatibility.

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