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65165-99-3

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65165-99-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 65165-99-3 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 6,5,1,6 and 5 respectively; the second part has 2 digits, 9 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 65165-99:
(7*6)+(6*5)+(5*1)+(4*6)+(3*5)+(2*9)+(1*9)=143
143 % 10 = 3
So 65165-99-3 is a valid CAS Registry Number.

65165-99-3Relevant academic research and scientific papers

Method for catalyzing asymmetric synthesis of codeine and morphine

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Paragraph 0066; 0110-0112, (2019/05/02)

The invention discloses a method for synthesizing codeine and morphine. The method comprises the following steps: (I) taking 3-butyne-1-alcohol as a starting raw material to synthesize a compound 6: (shown in the description) (II) compound 6 firstly has intramolecular Michael addition reaction under the catalysis of a spirocyclic amine catalyst, and then acid is added to perform the dehydration cyclization reaction to obtain a chiral compound 7 with a hydrogenated dibenzofuran structure: (shown in the description) (III) the compound 7 has allylation, ozone oxidation, Foucault reaction, epoxidation, Wharton oxygen transfer reaction, debenzylation, Mitsunobu reaction, DMP oxidation, and the conversion by virtue of the reduction of sodium borohydride and Birch reduction to obtain the codeine(shown in the description). Under the action of boron tribromide, the methyl protecting group is removed from the codeine to obtain morphine. Compared with the existing synthesis method, the total synthesis method of the invention is simpler, and the catalytic asymmetric reaction has the advantages of high enantioselectivity, high yield and the like.

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