Synthesis of N-citralbenzenamines by NaBH4/B(OH)3System

Abstract

Citral as α, β-unsaturated carbonyl compound has been reacted with structurally different anilines with sodium borohydride in the presence of boric acid for the synthesis of their corresponding N-citralbenzenamineswith good yields (75-85%)within 5 min in CH 3 CNat room temperature.

Highly Selective Room Temperature Monoreduction of Dinitro‐arenes by Hydrogen Sulfide under Liquid–Liquid Biphasic Catalysis

“…Reduction of dinitro aromatics like 2,4-DNT can give rise to a reduction of either both the nitro groups or a single nitro group selectively. In the reduction of 2,4-dinitrotoluene into 2,4-diaminotolune, several kinds of reagents have been tried out such as a Pd-pol catalyst in the presence of NaBH 4 [25], Ni(OAc) 2 ·4H 2 O in the presence of NaBH 4 [31], and zinc in ammonium formate/HCOOH [32]. Hydrogen at different pressure levels has been employed in selective monoreduction of 2,4-DNT in the presence of various catalysts such as Pt/C [33], Au [34], and Ni-supported zeolite [35].…”

Cobalt catalyzed chemoselective reduction of nitroarenes: hydrosilylation under thermal and photochemical reaction conditions

“…3 However, Ni-catalyzed reduction of nitroarenes with NaBH 4 is reported. 4 In addition to the use of stoichiometric reducing agents including metal hydride, transfer hydrogenation and classical hydrogenation of nitroarenes to aromatic amines have been well-explored. Hydrazines were also used as a hydrogen source and several catalysts have been reported.…”