Generation of strong, homochiral bases by electrochemical reduction of phenazine derivativesElectronic supplementary information (ESI) available: procedure for conversion of 7 into 9 using electrochemical reduction of 6a to generate the chiral base; crystallographic data for (pS)-4, 5b, 6a and 6b. See http://www.rsc.org/suppdata/cc/b3/b313995f/ | Publicación