Atom‐economic synthesis: The syn‐ and highlyenantioselective Henry reactions of aliphaticaldehydescatalyzed by a readilyavailable β‐amino alcohol copper catalyst were developed and successfully utilized in the synthesis of safingol. The ligand could be easily recovered without any racemization (see scheme).
Recoverable PEG-supported amino alcohol ligand for copper-catalyzed Enantio- and syn-selective henry reaction with nitroethanol: Sustainable and straightforward access to chiral syn-2-nitro-1,3-Diols
A poly(ethylene glycol) (PEG) supported amino alcohol has been developed as a chiral ligand to promote the copper-catalyzed asymmetric nitrolaldol reaction (Henry Reaction) with nitroethanol. The catalyst provides direct access to various syn-2-nitro-1,3-diols with high yields and stereoselectivities. The solubility of PEG moiety allows facile purification and recycling of the catalyst. The utility