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5233-99-8

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5233-99-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 5233-99-8 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 5,2,3 and 3 respectively; the second part has 2 digits, 9 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 5233-99:
(6*5)+(5*2)+(4*3)+(3*3)+(2*9)+(1*9)=88
88 % 10 = 8
So 5233-99-8 is a valid CAS Registry Number.

5233-99-8Relevant articles and documents

van Broekhoven,L.W. et al.

, p. 2909 - 2910 (1974)

Organocatalytic epoxidation and allylic oxidation of alkenes by molecular oxygen

Orfanidou, Maria,Petsi, Marina,Zografos, Alexandros L.

supporting information, p. 9172 - 9178 (2021/11/30)

Pyrrole-proline diketopiperazine (DKP) acts as an efficient mediator for the reduction of dioxygen by Hantzsch ester under mild conditions to allow the aerobic metal-free epoxidation of electron-rich alkenes. Mechanistic crossovers are underlined, explaining the dual role of Hantzsch ester as a reductant/promoter of the DKP catalyst and a simultaneous competitor for the epoxidation of alkenes when HFIP is used as a solvent. Expansion of this protocol to the synthesis of allylic alcohols was achieved by adding a catalytic amount of selenium dioxide as an additive, revealing a superior method to the classical application of t-BuOOH as a selenium dioxide oxidant.

Relay Cross Metathesis for the Iterative Construction of Terpenoids and Synthesis of a Diterpene-Benzoate Macrolide of Biogenetic Relevance to the Bromophycolides

Bahou, Karim A.,Braddock, D. Christopher,Meyer, Adam G.,Savage, G. Paul

supporting information, p. 3176 - 3179 (2020/04/15)

We report a relay cross metathesis (ReXM) reaction for the construction of terpenoids in an iterative protocol. The protocol features the cross metathesis of a relay-actuated Δ6,7-functionalized C10-monoterpenoid alcohol with C10-monoterpenoid citral to form a C15-sesquiterpene. Subsequent functional group manipulation allows for the method to be repeated in an iterative fashion. The method is used for the synthesis of a diterpene-benzoate macrolide of biogenetic relevance to the bromophycolide family of natural products.

Biomimetic cyclization of epoxide precursors of indole mono-, sesquiand diterpene alkaloids by lewis acids

Isaka, Tetsuya,Hasegawa, Morifumi,Toshima, Hiroaki

experimental part, p. 2213 - 2222 (2012/02/14)

Cyclization of the synthesized epoxide precursors of indole mono-, sesqui- and diterpene alkaloids was performed to elucidate the mechanism for biomimetic cationic cyclization to polycyclic structures. 3-(6,7- Epoxygeranyl)indole (11), 3-(10,11-epoxyfarne

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