Aldehydes diastereoselectivity

Arene)tricarbonylchromiums in cycloadditions, 5, 243 in higher-order cycloadditions, 5, 244 in silsesquioxanes, 5, 252 Aromatic acetylenes, silylformylation, 11, 477 Aromatic aldehydes, diastereoselective coupling reactions, 11,44... 

Bulbule, V. J., Deshpande, V. H., Velu, S., Sudalai, A., Sivasankar, S. and Sathe, V. T. (1999). Heterogeneous Henry reaction of aldehydes diastereoselective synthesis of nitroalcohol derivatives over Mg-Al hydrotalcites. Tetrahedron 55, 9325. 

The aUcene 24 can be cyclopropanated with diazomethane in high yield, offering an attractive way to functionalize a,/3-unsaturated aldehydes diastereoselectively by first forming the N,0-acetales with chiral amino alcohols (Scheme... 

Initial investigations sought to add boron enolates of butanone directly to 89 howevo , as often occurs with chiral aldehydes, diastereoselectivity was poor. Since the attachment of chiral ligands to the boron enolate failed to change this outcome, the Paterson group turned to reactions that proceeded through acyclic stereocontrol. 

J. Pandey, N. Anand, R.P. Tripathi, L-Proline catalyzed multicomponent reaction of 3,4 dihydro-(2H)-pyran, urea/thiourea, and aldehydes diastereoselective synthesis of hexahydropyranopyrimidinones (thiones). Tetrahedron 65 (2009) 9350-9356. 

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