Method for the preparation of aromatic chloroformates
申请人:Davis Charles Gary
公开号:US20060293535A1
公开(公告)日:2006-12-28
A method for preparing an aromatic chloroformate comprising, introducing a mixture of at least one aromatic hydroxyl compound, phosgene, at least one solvent, and at least one organic base into a flow reactor to obtain a unidirectionally flowing reaction mixture. The unidirectionally flowing reaction mixture is maintained at a temperature between about 0° C. and about 60° C. to produce a single product stream comprising an aromatic chloroformate.
Simple structures – high reactivity: various types of terminalacetylenic iminium triflate salts have been prepared and isolated. First reactivity studies show that they are more than just synthetic equivalents of acetylenic ketones or aldehydes. They are exceedingly reactive dienophiles in Diels‐Alder reactions, undergo smooth conjugate addition with X‐H nucleophiles and can lead to unexpected products
Iron‐Promoted Domino Dehydrogenative Annulation of Deoxybenzoins and Alkynes Leading to β‐Aryl‐α‐Naphthols
作者:Xue‐Qing Zhu、Rui‐Li Guo、Xing‐Long Zhang、Ya‐Ru Gao、Qiong Jia、Yong‐Qiang Wang
DOI:10.1002/adsc.202000625
日期:2020.8.4
A strategy for synthesis of β‐aryl‐α‐naphthols has been established through an iron‐promoted domino C(sp 3)−H/C(sp )−H and C(sp 2)−H/C(sp )−H dehydrogenative coupling of deoxybenzoins and alkynes. The synthesis uses inexpensive materials with a broad substrate scope and features simple operations with excellent regioselectivity. This study provides an alternative access to various β‐aryl‐α‐naphthols