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This paper is divided into two chapters : Chapter 1 : In recent years, the aqueous phase, the study of a variety of organic reactions progress in recent years , with water as the organic reaction solvent reported one after another , the water phase organic synthesis organic chemistry research has increasingly become hot spots. In this paper, the various types of organic chemical reactions in the aqueous medium . Chapter 2 : water some of the organic synthesis of heterocyclic compounds 2.1 water \, 6,7,8 - tetrahydro - benzo [b] pyran HTMAB and dodecylbenzene sulfonic acid (DBSA) , respectively as the catalyst , aromatic aldehydes , malononitrile, and 5,5 - dimethyl-1 , 3 - cyclohexanedione as a raw material in the water step of generating 2 - amino - 3 - cyano-4 - aryl -7,7 - dimethyl - 5 - oxo - 4H -5 , 6,7,8 - tetra hydrogen benzo [b] pyran . easy operation, high yield , but also friendly to the environment . 2.2 water 4 - aryl -7,7 - dimethyl-5 -oxo- 3 ,4,5,6,7,8 - Hexahydrocoumarin synthesis of aromatic aldehydes , isopropylidene malonic acid and 5 , 5 - dimethyl -1,3 - cyclohexanedione in HTMAB catalytic under stirring in water at room temperature to step generates 4 - aryl-7 ,7 -dimethyl-5 -oxo- 3 ,4,5 , 6,7,8 - hexahydrocoumarin , mild reaction conditions , simple post-processing , most of the new compounds . 2.3 water for 3 - methyl-6 - amino-5 - cyano-4 - aryl -1 - phenyl-1 ,4 - dihydro- pyrano [ 2,3- c ] pyrazole clean synthesis of aromatic aldehydes , propoxy the dinitrile and 3 - methyl-1 - phenyl - 2 - pyrazoline - 5 - one under the existing conditions in the water HTMAB step to high yields of 3 - methyl - 6 - amino - 5 - cyano - 4 - aryl -1 - phenyl-1 ,4 - dihydro- pyrano [ 2,3 - c ] pyrazole.
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