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41410-55-3

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41410-55-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 41410-55-3 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 4,1,4,1 and 0 respectively; the second part has 2 digits, 5 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 41410-55:
(7*4)+(6*1)+(5*4)+(4*1)+(3*0)+(2*5)+(1*5)=73
73 % 10 = 3
So 41410-55-3 is a valid CAS Registry Number.

41410-55-3Upstream product

41410-55-3Relevant articles and documents

Effects of solvents and water in Ti(III)-mediated radical cyclizations of epoxygermacrolides. Straightforward synthesis and absolute stereochemistry of (+)-3α-hydroxyreynosin and related eudesmanolides

Barrero, Alejandro F.,Enrique Oltra,Cuerva, Juan M.,Rosales, Antonio

, p. 2566 - 2571 (2007/10/03)

The Cp2TiCl-mediated rearrangement of 1,10-epoxy-11β,13-dihydrocostunolide (4) was carried out using different solvents and additives to develop an expeditious procedure for the synthesis of natural eudesmanolides via free-radical chemistry. In the nonhalogenated solvents THF, benzene, and toluene the transannular cyclization, initiated by the homolytic opening of the oxirane ring, selectively led to the desired exocyclic alkene 5. When water was added to THF, however, the main product was reduced eudesmanolide 8. Experiments with D2O confirmed that the H-4 of 8 comes from water. To rationalize these results, a mechanistic hypothesis based on a water-solvated Cp2TiCl complex is proposed. Finally, the usefulness of Cp2TiCl for the synthesis of natural eudesmanolides has been proved using this reagent in the key step for the chemical preparation of (+)-3α-hydroxyreynosin (1) and (+)-reynosin (17). These syntheses confirmed the chemical structure of 1 and established the absolute stereochemistry of the natural products 1 and 17. The results obtained suggest that the combination of the biomimetic strategy employed, with Ti(III)-mediated free-radical chemistry, may come to represent a general method for the enantiospecific synthesis of more than 170 natural eudesmanolides containing an exocyclic double bond between C-4 and C-15.

Biomimetic Synthesis of Chapliatrin Type Compounds

Gonzalez, Antonio G.,Galindo, Antonio,Mansilla, Horacio,Gutierrez, Angeles,Palenzuela, Jose A.,et al.

, p. 5856 - 5858 (2007/10/02)

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