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185198-44-1

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  • 8-BENZENESULFONYL-5-OXO-1,2,3,5-TETRAHYDROINDOLIZIN-6-YL TRIFLUOROMETHANESULFONATE

    Cas No: 185198-44-1

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185198-44-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 185198-44-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,8,5,1,9 and 8 respectively; the second part has 2 digits, 4 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 185198-44:
(8*1)+(7*8)+(6*5)+(5*1)+(4*9)+(3*8)+(2*4)+(1*4)=171
171 % 10 = 1
So 185198-44-1 is a valid CAS Registry Number.
InChI:InChI=1/C15H12F3NO6S2/c16-15(17,18)27(23,24)25-12-9-13(11-7-4-8-19(11)14(12)20)26(21,22)10-5-2-1-3-6-10/h1-3,5-6,9H,4,7-8H2

185198-44-1Relevant articles and documents

1,3-Dipolar cycloaddition chemistry for the preparation of novel indolizinone-based compounds

Mmutlane, Edwin M.,Harris, Joel M.,Padwa, Albert

, p. 8055 - 8063 (2007/10/03)

Starting from methyl 5-oxo-6-trifluoromethanesulfonyloxy-1,2,3,5- tetrahydroindolizine-8-carboxylate, obtained by a Rh(II)-catalyzed 1,3-dipolar cycloaddition reaction of 1-(2-benzenesulfonyl-2-diazoacetyl)pyrrolidin-2-one and methyl acrylate, several indolo- and furano-fused indolizinones were efficiently prepared. In the first case, a palladium-mediated C-N coupling of the triflate with a variety of substituted anilines provided the desired methyl 5-oxo-6-(arylamino)-1,2,3,5-tetrahydroindolizine-8-carboxylates in high yield. Methyl 6-(2-bromophenylamino)-5-oxo-1,2,3,5-tetrahydroindolizine-8-carboxylate as well as its decarboxylated analogue, 6-(2-bromophenylamino)-2,3-dihydro-1H- indolizin-5-one, were synthesized in excellent yield and were found to undergo an intramolecular Heck cyclization to give 1,2,3,6-tetrahydroindolizino[6,7-b] indol-5-ones. To prepare furano-fused indolizinones, methyl 6-hydroxy-5-oxo-1,2, 3,5-tetrahydroindolizine-8-carboxylate was etherified with different allyl halides, and the resultant allyl ethers were subjected to a thermal Claisen rearrangement to give the corresponding methyl 7-allyl-6-hydroxy-5-oxo-1,2,3,4- tetrahydroindolizine-8-carboxylates. Cyclization under Wacker oxidation conditions afforded methyl 2-methyl-8-oxo-5,6,7,8-tetrahydro-1-oxa-7a-aza-s- indacene-4-carboxylates in near-quantitative yield.

New synthetic route to 2-pyridones and its application toward the synthesis of (±)-ipalbidine

Sheehan, Scott M.,Padwa, Albert

, p. 438 - 439 (2007/10/03)

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