Chapter 3:Development of QSAR
2011
Since the first reports appeared more than fifty years ago, using the computer to analyze structure–activity relationships has grown into a vibrant field. The original work recognized the key role of the optimum hydrophobicity in the biological properties of molecules. It also put hydrophobicity on a scale to be used in a multivariate equation of substituent effects, also characterized with Hammett sigma constants and parameters for steric properties. Subsequent work led to computer programs to calculate octanol–water log P from structure alone, as well as methods to treat categorical data. In addition, 3D QSAR has become a popular alternative strategy. Non-statistical methods for analyzing the data have been implemented and strategies to investigate and improve the predictivity of QSARs have been developed.
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