a simple , efficient , and environmentally 
 friendly asymmetric epoxidation of primary , secondary , tertiary allylic , 
 and homoallylic alcohols has been accomplished . 
 this process was promoted 
 by a tungsten  bishydroxamic acid complex at room temperature 
 with the use of aqueous 30% h2o2 as oxidant , 
 yielding the products in 8498% ee .