Nitroanilinomethanephosphonates derived from ferrocene and nitrobenzaldehyde

The unusual stereochemical behavior in the addition of phosphites to N-1-naphthyl terephthalic and isophthalic Schiff bases

“…As this analysis showed no appearance of the other diastereoisomeric form, we can state that the stereoselectivity could not arise from preferential crystallisation of one of the isomers. Analogously to the previous case [21], we supposed that aminophosphonates 2b and 2c are meso-forms. To confirm this, we performed another experiment.…”

“…Considering the postulated mechanism [21], we suppose that steric reasons are the factors determining the stereochemistry of this reaction. If we consider that the mono-addition intermediate adopts the conformation A, which seems to be sterically convenient, the hydrogen bonding cannot occur due to the distance between N-H and C‫ס‬N groups.…”

“…As it was previously shown [17][18][19][20], this addition is stereoselective. In our previous article [21], we recognized the exclusive product as the meso-form, and we proposed the mechanism of the stereochemistry of this reaction. We explained this by the formation of intermolecular hydrogen bonding [21].…”

“…In our previous article [21], we recognized the exclusive product as the meso-form, and we proposed the mechanism of the stereochemistry of this reaction. We explained this by the formation of intermolecular hydrogen bonding [21]. In this article, we would like to report the first synthesis of N-1-naphthyl substituted phenylene-bis-(aminomethanephosphonates) and by the addition of dialkyl and diaryl phosphites to the azomethine bond of bis-N-naphthyl substituted Schiff bases of terephthalic and isophthalic aldehydes and to discuss the unusual stereochemistry of this reaction.…”

An Efficient and Eco-Friendly Nanocrystalline Zinc Oxide Catalyst for One-Pot, Three Component Synthesis of New Ferrocenyl Aminophosphonic Esters Under Solvent-Free Condition

“…Lewkowski and co-workers [58][59][60] synthesized and fully characterized some ferrocenyl aminophosphonates. Their method for the synthesis of these compounds involves two steps.…”