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Toluene-4-sulfonic acid (3S,5aS,9aR,9bR)-3-isopropyl-9b-methyl-8-(4-methyl-pent-3-enyl)-5-oxo-2,3,6,9,9a,9b-hexahydro-oxazolo[2,3-a]isoindol-5a-ylmethyl ester is a chemical with a specific purpose. Lookchem provides you with multiple data and supplier information of this chemical.

128374-25-4

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128374-25-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 128374-25-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,2,8,3,7 and 4 respectively; the second part has 2 digits, 2 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 128374-25:
(8*1)+(7*2)+(6*8)+(5*3)+(4*7)+(3*4)+(2*2)+(1*5)=134
134 % 10 = 4
So 128374-25-4 is a valid CAS Registry Number.

128374-25-4Relevant academic research and scientific papers

An asymmetric route to fused carbocyclic systems via Diels-Alder reactions on chiral α,β-unsaturated bicyclic lactams

Meyers,Busacca

, p. 6977 - 6980 (1989)

The cycloadducts from Diels-Alder reactions have been transformed into novel functionalized carbocycles 11 and 12 in high enantiomeric excess.

Asymmetric Diels-Alder Reactions. A Route to Chiral Carbocycles via Bicyclic Lactams

Busacca, Carl A.,Meyers, A. I.

, p. 2299 - 2316 (2007/10/02)

The L-valinol-derived unsaturated lactam methyl 3-isopropyl-7a-methyl-5-oxo-2,3-dihydro-7aH-pyrrolooxazole-6-carboxylate functions as an excellent chiral dienophile in asymmetric Diels-Alder reactions.Diene approach occurs exclusively from the α-(e

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