good yields. Aryldiazonium salts that have an electron-donating substituent underwent a smooth reaction in the presence of Pd2dba3. A palladium complex that coordinated with an electron-rich ligand was necessary for the reaction to progress with electron-deficient aryldiazonium salts. An opticallyactive allylic nitro compound underwent reaction without the loss of optical purity at the stereogenic
Optical resolution of 2-methyl-2-nitrobut-3-en-1-ol has been accomplished using a “low-temperature lipase-catalyzed transesterification” carried out at −40 °C.