dict.md logo
Choose languages of interest
SELECT >>
English
Advertisement:
Translation
 
0 translations
 
Definition
 
enEnglish
Aldehydes definition: Organic compounds containing a carbonyl group in the form -CHO.
aldehyde definition: organic compounds containing a carbonyl group in the form -CHO.
 
Examples
 

Condensation of 2 H -benzo[ g ][1,2]oxasilocines with aromatic aldehydes in the presence of boron trifluoride affords mixtures of cis/trans 2-phenyl-3-vinylchromans with moderate yields.

Míriam Álvarez-Corral et al.

Beilstein Journal of Organic Chemistry 3 (7), 08 Feb 2007

The Sakurai-Hosomi is a useful variant of allylation reactions, [ 1 ] which has been used for the formation of carbo- and heterocycles. [ 2 , 3 ] We have applied it to the stereoselective synthesis of dihydrobenzofurans by means of the condensation of benzoxasilepines with aromatic aldehydes in the presence of Lewis acids. [ 4 , 5 ] Using this methodology and through convergent synthetic routes, we have prepared pterocarpans [ 6 ] and neolignans. [ 7 ] These good results have encouraged us to undertake the extension of the method to the use of benzo [ g ][1,2]oxasilocines for the preparation of chromans.

Míriam Álvarez-Corral et al.

Beilstein Journal of Organic Chemistry 3 (7), 08 Feb 2007

Reaction of benzoxasilocines with aromatic aldehydes in the presence of BF 3 ·Et 2 O We had previously observed [ 4 ] that the treatment of the seven membered cyclic allylsiloxane 2,3-dihydro-2,2-dimethylbenzo [ f ][1,2]oxasilepine with boron trifluoride yielded a ring-opened fluorinated derivative.

Míriam Álvarez-Corral et al.

Beilstein Journal of Organic Chemistry 3 (7), 08 Feb 2007

This derivative was able to perform the condensation with aromatic aldehydes to generate the dihydrobenzofuran final products in the presence of a second equivalent of BF 3 ·Et 2 O.

Míriam Álvarez-Corral et al.

Beilstein Journal of Organic Chemistry 3 (7), 08 Feb 2007

Conclusion The condensation of benzoxasilocines with aromatic aldehydes in the presence of boron trifluoride has been studied.

Míriam Álvarez-Corral et al.

Beilstein Journal of Organic Chemistry 3 (7), 08 Feb 2007

49 further examples >>