114264-05-0Relevant academic research and scientific papers
METHOD FOR PREPARING (3S,4S)-4-((R)-2-(BENZYLOXY)TRIDECYL)-3-HEXYL-2-OXETANONE AND NOVEL INTERMEDIATE USED THEREFOR
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Page/Page column 11-12, (2010/06/11)
The present invention relates to a high-yield method for preparing highly pure (3S,4S)-4-((R)-2-(benzyloxy)tridecyl)-3-hexyl-2-oxetanone using a metal salt of (2S,3S,5R)-2-hexyl-3,5-dihydroxyhexadecanoic acid as an intermediate.
Stereoselective syntheses of (-)-tetrahydrolipstatin via Prins cyclisations
Yadav,Reddy, M. Sridhar,Prasad
, p. 4995 - 4998 (2007/10/03)
Stereoselective syntheses of (-)-tetrahydrolipstatin have been achieved via two divergent approaches through Prins cyclisations as the key steps. PCC mediated oxidative cleavage, Frater alkylation, Keck allylation, Sharpless asymmetric epoxidation and allylic cleavage were the other key steps employed.
Stereoselective synthesis of (-)-tetrahydrolipstatin via a radical cyclization based strategy
Yadav,Vishweshwar Rao,Sridhar Reddy,Prasad
, p. 4393 - 4395 (2007/10/03)
An efficient and flexible approach for the total synthesis of (-)-tetrahydrolipstatin is described. The main features of the synthetic strategy are a stereocontrolled radical cyclization and the successful utilization of commercially available S-malic acid.
Anti-aldol reactions of lactate-derived ketones. Application to the synthesis of (-)-tetrahydrolipstatin
Paterson,Doughty
, p. 393 - 394 (2007/10/03)
(-)-Tetrahydrolipstatin (1) was prepared with a high level of stereocontrol (>98% ds) by employing a boron-mediated, anti-selective, aldol coupling between the (R)-lactate-derived ketone 7 and the aldehyde 8.
An asymmetric synthesis of (-)-tetrahydrolipstatin
Pommier,Pons
, p. 1294 - 1300 (2007/10/02)
A key step in a short asymmetric synthesis of the potent pancreatic lipase inhibitor (-)-tetrahydrolipstatin (2) is a Lewis acid-catalysed [2 + 2] cycloaddition of n-hexyl(trimethylsilyl)ketene (5) to (R)-3-(tertbutyldimethylsilyloxy)tetradecanal (4a).
Total synthesis of (-)-tetrahydrolipstatin
Hanessian,Tehim,Chen
, p. 7768 - 7781 (2007/10/02)
The total synthesis of (-)-tetrahydrolipstatin utilizing two approaches is described. In the first, L-malic acid was used as a chiral template to obtain enantiomerically pure (R)-3-(benzyloxy)-tetradecanal (11) which was chain- extended using 1-(trimethylsilyl)-2-nonene and a Lewis acid. This advanced intermediate was further elaborated to the target compound in good overall yield. The second approach utilized lauraldehyde as a starting material and capitalizes on an asymmetric allylboronation (91% ee). The product could be obtained enantiomerically pure by conversion to the (R)-acetoxymandelate ester and hydrolysis. Oxidative cleavage of the terminal double bond led to 11 which was further extended using 1,3- and 1,2-asymmetric induction based on existing neighboring chirality. The synthesis of tetrahydrolipstatin using the second approach comprises seven steps from 11 and proceeds in 38% overall yield.
