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16049-29-9

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16049-29-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 16049-29-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,6,0,4 and 9 respectively; the second part has 2 digits, 2 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 16049-29:
(7*1)+(6*6)+(5*0)+(4*4)+(3*9)+(2*2)+(1*9)=99
99 % 10 = 9
So 16049-29-9 is a valid CAS Registry Number.

16049-29-9Downstream Products

16049-29-9Relevant articles and documents

ALKALOIDS FROM ROOTS OF STRYCHNOS POTATORUM

Massiot, Georges,Theepenier, Philippe,Jacquier, Marie-Jose,Men-Olivier, Louisette Le,Delaude, Clement

, p. 2873 - 2876 (1992)

Twenty-four compounds have been isolated and identified in the root bark of Strychnos potatorum.They are: Harmane carboxamide, cantleyine, 18,19-dihydrousambarensine, polyneuridine, norharmane, akuammidine, nor-C-flurorocurarine, ochrolifuanine A, bisnordihydrotoxiferine, ochrolifuanine E, normacusine B, normavacurine, henningsamine, 11-methoxyhenningsamine, dihydrolongicaudatine, dihydrolongicaudatine Y, anthrhine, (20R)- and (20S)-dihydroantirhine, 11-methoxy-12-hydroxydiaboline, diaboline, 11-methoxydiaboline, desacetylretuline and diaboline N-oxide. Key words: Strychnos potatorum; Loginaceae; root bark; indole alkaloids.

A Stereodivergent Strategy for Total Syntheses of Antirhine Alkaloids

Park, Eunjoon,Bae, Cheolwoo,Cho, Cheon-Gyu,Cheon, Cheol-Hong

, p. 4497 - 4511 (2021/04/02)

Total syntheses of the antirhine alkaloids are described. The cyanide-catalyzed imino-Stetter reaction of the aldimine derived from ethyl 2-aminocinnamate and 4-bromopyridine-2-carboxaldehyde provided a 2-pyridinyl substituted indole-3-acetate, which was further converted into the corresponding indoloquinolizidinium intermediate through C-ring formation. Subsequent trans-selective installation of the homoallylic alcohol side-chain at C-15 in the resulting indoloquinolizidinium allowed the total syntheses of antirhine and its known epimer.

Efficient biomimetic synthesis of indole alkaloids of the vallesiachotamine group by a domino knoevenagel hetero Diels-Alder hydrogenation sequence

Tietze, Lutz F.,Bachmann, Juergen,Wichmann, Juergen,Zhou, Yifa,Raschke, Thomas

, p. 881 - 886 (2007/10/03)

An efficient three-step biomimetic synthesis of the four diastereomeric 18,19-dihydroantirhines 4a-d starting from the tetrahydrocarboline aldehydes 5a and 5b is described. Domino reaction of the aldehydes 5a and 5b, respectively, with Meldrum's acid (6) and the enol ethers 8a and 8b in the presence of catalytic amounts of ethylenediammonium diacetate leads to the strictosidine analogues 10a-d and 11a-h, respectively, in 74-86% yield, hydrogenation of which gives mainly 15 and 16 with the skeleton of the vallesiachotamine indole alkaloids (55-86%). In addition, small amounts of 17 and 18 with the corynanthe skeleton are also formed (10-12%). Reduction of both 15 and 16 with LiAlH4 yields the diastereomeric rac-18,19-dihydroantirhines 4a-d in 78-86% yield. VCH Verlagsgesellschaft mbH, 1997.

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