Lithium Bromide-Catalyzed Highly Chemoselective and Efficient Dithioacetalization of α,β-Unsaturated and Aromatic Aldehydes under Solvent-Free Conditions
作者:Habib Firouzabadi、Nasser Iranpoor、Babak Karimi
DOI:10.1055/s-1999-3679
日期:——
Chemoselective dithioacetalization of aromatic- and α,β-unsaturated aldehydes in the presence of other structurally different aldehydes and ketones was achieved efficiently in the presence of catalytic amounts of LiBr under solvent-free conditions. Due to the neutral reaction conditions, this method is compatible with acid sensitive substrates.
Lithium trifluoromethanesulfonate (LiOTf) as a highly efficient catalyst for chemoselective dithioacetalization of carbonyl compounds under neutral and solvent-free conditions
作者:Habib Firouzabadi、Babak Karimi、Shahram Eslami
DOI:10.1016/s0040-4039(99)00647-4
日期:1999.5
Various types of carbonylcompound can be efficiently and chemoselectively converted to their corresponding dithioacetals in the presence of catalytic amounts of lithium triflate under solvent-free conditions. Due to the neutrality of the reaction medium, this method is especially useful for acid sensitive substrates.