Molecular Synthesizability and Synthetic Tree Generation for Molecular Design - Wenhao Gao
Molecular Modelling and Drug Discovery29 Jan 2022

Molecular Synthesizability and Synthetic Tree Generation for Molecular Design - Wenhao Gao

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Abstract: Molecular design and synthesis planning are two critical steps in the process of molecular discovery that we propose to formulate as a single shared task of conditional synthetic pathway generation. We report an amortized approach to generate synthetic pathways as a Markov decision process conditioned on a target molecular embedding. This approach allows us to conduct synthesis planning in a bottom-up manner and design synthesizable molecules by decoding from optimized conditional codes, demonstrating the potential to solve both problems of design and synthesis simultaneously. The approach leverages neural networks to probabilistically model the synthetic trees, one reaction step at a time, according to reactivity rules encoded in a discrete action space of reaction templates. We train these networks on hundreds of thousands of artificial pathways generated from a pool of purchasable compounds and a list of expert-curated templates. We validate our method with (a) the recovery of molecules using conditional generation, (b) the identification of synthesizable structural analogs, and (c) the optimization of molecular structures given oracle functions relevant to drug discovery.

Speaker: Wenhao Gao - https://twitter.com/wenhaogao1

Twitter Prudencio: https://twitter.com/tossouprudencio

Twitter Therence: https://twitter.com/Therence_mtl

Twitter Cas: https://twitter.com/cas_wognum

Twitter Valence Discovery: https://twitter.com/valence_ai

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