Combined Sonogashira-Alkyne Hydration strategy is an alternative synthetic strategy for the synthesis of alkylphenones containing target compounds via regioselective Sonogashira coupling followed by in situ catalytic hydration of the resultant alkyne.

In this paper we have discussed and Compared the π bonds strength and σ bond Strength in carbon-carbon double bond and carbon-carbon triple bond.

Under different hetero-statues, the nucleophilic addition of triple bond compound is easier than that of double bond has been explained theoritically.

Convenient matrix calculation method for critical path in twin code network chart;

This paper analyzes the time-scaled network plan applied to confirm critical path,gain time factors,control network plan and so on.

Based on the study of calculating approaches of fuzzy network,this paper puts forward a new method to calculate the parameters and determine the critical path of fuzzy network planning.