In this communication we describe our recent results from a study on catalytic heterogeneous hydrogenation reactions of Baylis-Hillman adducts. Depending on the protecting groups used on the secondary hydroxyl group of these adducts, it is possible to obtain a high degree of diastereoselection. For silylated Baylis-Hillman adducts a high syn diastereoselectivity has been obtained. However, when secondary Baylis-Hillman hydroxyl groups were unprotected or protected as acetate a moderate anti selectivity was attained. The adducts protected as methyl ether gave poor syn diastereoselectivity.
ekonomi berasal dari bahasa Yunani yaitu oikos(rumah tangga) dan nomus(pengaturan) ilmu ekonomi (economics) adalah bagian ilmu social yang mempelajari bagaimana manusia menentukan pilihan dalam menggunakan sumber daya (resources) untuk menghasilkan benda (commodity) yang mereka butuhkan dalam hidup mereka agar memperoleh guna/manfaat (utility) yang sebesar-besarnya.
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