Multiple core structure libraries MCSL

By explaining these templates in detail, we will show their possibilities as key intermediates for the synthesis of a large range of different core structures. Tempest and Armstrong [11] have introduced the term Multiple Core Structure Libraries (MCSL) for resin-bound squaric acid derivatives. 

Figure 6.27 A scheme for generating a multiple core structure library (MCSL). (From Tempest, P.A. Armstrong, R.W. Cyclobutendione derivatives on solid support Toward multiple core structure libraries. J. Am. Chem. Soc. 1997, 119, 7607-7608.)...

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