A Diamine‐Oriented Biorefinery Concept Using Ammonia and Raney Ni as a Multifaceted Catalyst

Abstract

Diamines are important industrial chemicals. In this paper we outline the feasibility of lignocellulose as a source of diolcontaining molecules. We also illustrate the possibility of turning these diols into their diamines in good to excellent yields. Central to these transformations is the use of commercially available Raney Ni. For diol formation, the Raney Ni engages in hydrogenation and often also demethoxylation, that way funneling multiple components to one single molecule. For diamine formation, Raney Ni catalyzes hydrogen-borrowing mediated diamination in the presence of NH 3 .

Deriving high value products from depolymerized lignin oil, aided by (bio)catalytic funneling strategies

“…[188][189][190][191] Synthetically, MA can be obtained from both saccharides and lignin-derived compounds via a range of microbial metabolic pathways. 192 However, as to the lignin route this has been currently mainly demonstrated for lignin-derived model compounds such as benzoate, p-coumarate, ferulate, catechol, and vanillin. [193][194][195][196][197] And indeed few reports exist on the synthesis of MA directly from lignin or for that matter a depolymerized lignin oil stream.…”