Doping of l-sodium hydrogen glutamate produced new helical silica by sol–gel.
Chiral ruthenium–sulfamide complexes were synthesized and used as catalysts.
Chiral induction synergy of multiple chiral centers behaved as “zero-sum game”.
Ru complexes immobilized on doped silica were better than those on non-doped one.
Imidazolium ionic liquid improved recycling of ruthenium catalysts.