Disclosed herein is an efficient, economical, industrially advantageous, straight-through process for the preparation of cyclic amides, also referred as lactams, in substantially pure form and high yield, from the corresponding cyclic ketones and a hydroxylammonium salt, using a combination of amphoteric metal oxide or amphoteric masked metal oxide and a base.

Disclosed herein is an efficient, economical, industrially advantageous, straight-through process for the preparation of cyclic amides, also referred as lactams, in substantially pure form and high yield, from the corresponding cyclic ketones and a hydroxylammonium salt, using a combination of amphoteric metal oxide or amphoteric masked metal oxide and a base.

Disclosed herein is an efficient, economical, industrially advantageous, straight-through process for the preparation of cyclic amides, also referred as lactams, in substantially pure form and high yield, from the corresponding cyclic ketones and a hydroxylammonium salt, using a combination of amphoteric metal oxide or amphoteric masked metal oxide and a base.

Disclosed herein is an efficient, economical, industrially advantageous, straight-through process for the preparation of cyclic amides, also referred as lactams, in substantially pure form and high yield, from the corresponding cyclic ketones and a hydroxylammonium salt, using a combination of amphoteric metal oxide or amphoteric masked metal oxide and a base.

The substituted naphthyridinyl hydrazine compounds as anti-liver cancer agents are anti-liver cancer agents that inhibit proliferative pathways of cancer cells, thereby exhibiting potent in vitro and in vivo anticancer activity. The compounds have the formula: ##STR00001##
wherein R.sub.1 and R.sub.2 each are selected independently from hydrogen, mercapto, and C.sub.1-C.sub.5-alkyl, preferably methyl, ethyl, propyl, isopropyl or halogen; R.sub.3 and R.sub.4 each are selected independently from hydrogen, alkyl or halogen; and R.sub.5 is selected from substituted or unsubstituted aryl, more preferably from substituted phenyl, naphthyl, and substituted or unsubstituted heteroaryl, more preferably from furyl, pyrrolyl, thienyl, imidazolyl, thiadiazolyl, pyridinyl, pyridazinyl, pyrimidinyl, benzothiazolyl, oxadiazolyl or sugar moities. These agents exert their action through topoisomerase II inhibition.

The substituted naphthyridinyl hydrazine compounds as anti-liver cancer agents are anti-liver cancer agents that inhibit proliferative pathways of cancer cells, thereby exhibiting potent in vitro and in vivo anticancer activity. The compounds have the formula: ##STR00001##
wherein R.sub.1 and R.sub.2 each are selected independently from hydrogen, mercapto, and C.sub.1-C.sub.5-alkyl, preferably methyl, ethyl, propyl, isopropyl or halogen; R.sub.3 and R.sub.4 each are selected independently from hydrogen, alkyl or halogen; and R.sub.5 is selected from substituted or unsubstituted aryl, more preferably from substituted phenyl, naphthyl, and substituted or unsubstituted heteroaryl, more preferably from furyl, pyrrolyl, thienyl, imidazolyl, thiadiazolyl, pyridinyl, pyridazinyl, pyrimidinyl, benzothiazolyl, oxadiazolyl or sugar moities. These agents exert their action through topoisomerase II inhibition.

A method for preparing caprolactam by using a microreactor under Lewis acid catalysis, wherein a hydroxyl group in a cyclohexanone oxime is activated to obtain a cyclohexanone oxime sulfonates intermediate, then rearranged under Lewis acid catalysis to prepare the caprolactam. The method of this invention has a simple process and a high operation safety and selectivity, the reaction condition is mild, an efficient reaction can take place even at room temperature, the reaction time is short, the conversion of the cyclohexanone oxime can reach 100% within a short time, the selectivity of the caprolactam can reach 99%, the energy consumption is greatly reduced in the premise of maintaining a high yield, and the production cost is reduced, being an efficient and green and environmentally friendly method of for synthesizing the caprolactam.

Cyclododecanone (CDON) is prepared by epoxidizing cyclododecene (CDEN) to epoxycyclododecane (CDAN epoxide), and rearranging the CDAN epoxide to CDON to obtain a mixture comprising said CDON and cyclododecane (CDAN), wherein CDAN is separated from the CDON-containing mixture and oxidized to CDON.