2978-29-2Relevant academic research and scientific papers
Cp2TiCl2-CATALYZED REACTION OF GRIGNARD REAGENTS WITH ISOCYANATES, FORMATION OF CARBOXAMIDE WITH REARRANGED CARBONSKELETON
Zhang, Yongmin,Jiang, Jinlong,Chen, Yongqian
, p. 3815 - 3816 (1987)
Isocyanates react with isopropyl or sec-butylmagnesium bromide in the presence of a small amount of Cp2TiCl2 to afford amides with normal alkyl group.A possibl mechanism for this reaction is proposed.
Metal-free, hydroacylation of CC and NN bonds via aerobic C-H activation of aldehydes, and reaction of the products thereof
Chudasama, Vijay,Akhbar, Ahmed R.,Bahou, Karim A.,Fitzmaurice, Richard J.,Caddick, Stephen
supporting information, p. 7301 - 7317 (2013/10/22)
In this report, a thorough evaluation of the use of aerobically initiated, metal-free hydroacylation of various CC and NN acceptor molecules with a wide range of aldehydes is presented. The aerobic-activation conditions that have been developed are in sharp contrast to previous conditions for hydroacylation, which tend to use transition metals, peroxides that require thermal or photochemical degradation, or N-heterocyclic carbenes. The mildness of the conditions enables a number of reactions involving sensitive reaction partners and, perhaps most significantly, allows for α-functionalised chiral aldehydes to undergo radical-based hydroacylation with complete retention of optical purity. We also demonstrate how the resulting hydroacylation products can be transformed into other useful intermediates, such as γ-keto- sulfonamides, sultams, sultones, cyclic N-sulfonyl imines and amides.
Functionalisation of aldehydes via aerobic hydroacylation of azodicarboxylates 'on' water
Chudasama, Vijay,Ahern, Jenna M.,Dhokia, Dipti V.,Fitzmaurice, Richard J.,Caddick, Stephen
supporting information; experimental part, p. 3269 - 3271 (2011/05/02)
Herein we report the functionalisation of aldehydes via hydroacylation of azodicarboxylates. A range of functionalised aldehydes are employed as the limiting reagent including chiral non-racemic aldehydes bearing α-stereocentres which are functionalised giving access to enantiomerically pure products. The resultant hydrazides can be employed as acyl donors in the synthesis of amides.
