Synthesis of dimethylphosphorylamino diazo esters by a selective tandem Staudinger/Arbuzov rearrangement sequence of azido diazo esters with trimethylphosphite
摘要:
gamma-Azido-alpha-diazo-beta-keto esters react selectively with trimethylphosphite by a tandem Staudinger/Arbuzov rearrangement sequence, furnishing gamma-(dimethylphosphorylamino)-alpha-diazo-beta-keto esters in good yield under mild conditions. Collected X-ray data for the novel diazo phosphoramides confirm the proposed chemoselectivity. (C) 2003 Elsevier Science Ltd. All rights reserved.
Synthesis of dimethylphosphorylamino diazo esters by a selective tandem Staudinger/Arbuzov rearrangement sequence of azido diazo esters with trimethylphosphite
摘要:
gamma-Azido-alpha-diazo-beta-keto esters react selectively with trimethylphosphite by a tandem Staudinger/Arbuzov rearrangement sequence, furnishing gamma-(dimethylphosphorylamino)-alpha-diazo-beta-keto esters in good yield under mild conditions. Collected X-ray data for the novel diazo phosphoramides confirm the proposed chemoselectivity. (C) 2003 Elsevier Science Ltd. All rights reserved.
Metal substituted diazo esters as substrates for cross coupling reactions
作者:Albert Padwa、Marcus M. Sá、M. David Weingarten
DOI:10.1016/s0040-4020(96)01194-5
日期:1997.2
nucleophiles. The base-promoted reaction of ethyl 4-azido-2-diazo-3-oxo-butanoate with both acetaldehyde and benzaldehyde proceeded in high yield to produce mixed aldol products. The use of an equivalent amount of DABCO was found to be the best way to promote the reaction. The diastereoselectivity exhibited in the reaction is low and characteristic of condensations of α-substituted ketones with substituents
Synthesis of dimethylphosphorylamino diazo esters by a selective tandem Staudinger/Arbuzov rearrangement sequence of azido diazo esters with trimethylphosphite
作者:Marcus M. Sá、Gustavo P. Silveira、Adailton J. Bortoluzzi、Albert Padwa
DOI:10.1016/s0040-4020(03)00856-1
日期:2003.7
gamma-Azido-alpha-diazo-beta-keto esters react selectively with trimethylphosphite by a tandem Staudinger/Arbuzov rearrangement sequence, furnishing gamma-(dimethylphosphorylamino)-alpha-diazo-beta-keto esters in good yield under mild conditions. Collected X-ray data for the novel diazo phosphoramides confirm the proposed chemoselectivity. (C) 2003 Elsevier Science Ltd. All rights reserved.