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81677-37-4

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81677-37-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 81677-37-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,1,6,7 and 7 respectively; the second part has 2 digits, 3 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 81677-37:
(7*8)+(6*1)+(5*6)+(4*7)+(3*7)+(2*3)+(1*7)=154
154 % 10 = 4
So 81677-37-4 is a valid CAS Registry Number.

81677-37-4Relevant articles and documents

Stereoselective Synthesis of Coreoside D and Determination of Its Absolute Configuration

Imaizumi, Ryoya,Ogawa, Narihito

, p. 1409 - 1412 (2020/11/23)

We report the stereoselective synthesis of (3 S)- and (3 R)-coreoside D. The conjugated diyne in the C1-C14 moiety was synthesized through two types of palladium-catalyzed cross-coupling reaction. The introduction of the glucopyranose was achieved by a gl

Total synthesis of the proposed structure of heronamide C

Sakanishi, Kohei,Itoh, Shunya,Sugiyama, Ryosuke,Nishimura, Shinichi,Kakeya, Hideaki,Iwabuchi, Yoshiharu,Kanoh, Naoki

supporting information, p. 1376 - 1380 (2014/03/21)

The total synthesis of the proposed structure of heronamide C was accomplished through a Sato-Micalizio reductive alkyne-alkyne coupling strategy and remote-amine controlled stannylcupration. However, the physical data for the synthetic and natural samples differ from each other, which suggests that the proposed structure should be reinvestigated. The total synthesis of the proposed structure of heronamide C is accomplished by using a Sato-Micalizio reductive alkyne-alkyne coupling strategy and remote-amine-controlled stannylcupration. However, the physical data for the synthetic and natural samples differ from each other, which suggests that the proposed structure should be reinvestigated. Copyright

Practical methods for the synthesis of trifluoromethylated alkynes: Oxidative trifluoromethylation of copper acetylides and alkynes

Tresse, Cedric,Guissart, Celine,Schweizer, Stephane,Bouhoute, Yassine,Chany, Anne-Caroline,Goddard, Mary-Lorene,Blanchard, Nicolas,Evano, Gwilherm

supporting information, p. 2051 - 2060 (2014/07/07)

Two practical and complementary methods are reported for the synthesis of trifluoromethylated alkynes. The first one, a mix-and-stir process, is based on the oxidative trifluoromethylation of readily available and bench-stable copper acetylides while the second one, which displays a broad substrate scope and has several advantages over existing procedures, is based on the oxidative copper-catalyzed direct trifluoromethylation of terminal alkynes. Both reactions provide user-friendly processes for the synthesis of trifluoromethylated acetylenes which can be easily obtained from readily available starting materials.

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