A process for preparing a polyhydric alcohol according to the invention comprises subjecting a polyhydric alcohol compound having protected hydroxy group(s) to microwave irradiation in the presence of basic compound(s) or acid(s) having an acid dissociation exponent (pKa) of −8 to 3 at 25° C. to remove the protecting groups of the hydroxy group of the polyhydric alcohol compound. The invention can provide an industrially advantageous process for preparing polyhydric alcohols by readily removing protecting group(s) from protected hydroxy group(s) of polyhydric alcohol compounds.
PROCESS FOR THE PREPARATION OF POLYHYDRIC ALCOHOLS
申请人:National Institute of Advanced Industrial Science and Technology
公开号:EP1298115A1
公开(公告)日:2003-04-02
A process for preparing a polyhydric alcohol according to the invention comprises subjecting a polyhydric alcohol compound having protected hydroxy group(s) to microwave irradiation in the presence of basic compound(s) or acid(s) having an acid dissociation exponent (pKa) of -8 to 3 at 25°C to remove the protecting groups of the hydroxy group of the polyhydric alcohol compound. The invention can provide an industrially advantageous process for preparing polyhydric alcohols by readily removing protecting group(s) from protected hydroxy group(s) of polyhydric alcohol compounds.
Synthesis and use of ortho-(branched alkoxy)-tert-butoxybenzenes
作者:Slavko Rast、Michel Stephan、Barbara Mohar
DOI:10.1016/j.tetlet.2012.10.010
日期:2012.12
A series of sterically hindered o-(branched alkoxy)-tert-butoxybenzenes was efficiently prepared in good yields owing to a new practical and simple preparation of o-tert-butoxyphenol starting from catechol and isobutene. Use of DMF di-tert-butyl acetalreagent instead of isobutene/H2SO4 (cat.) for O-tert-butylation was very convenient in case of ortho bulky phenols affording the corresponding tert-butyl
一系列的空间位阻ø - (支链烷氧基) -叔-butoxybenzenes在由于一个新的实用和简单的制备良好的产率被有效地制备ø -叔-butoxyphenol从儿茶酚和异丁烯开始。DMF的使用二-叔丁基缩醛试剂代替异丁烯/ H 2 SO 4(催化量)为ø -叔-butylation是非常方便在的情况下,邻位笨重酚得到相应的叔丁基醚以高收率和纯度。事实证明,这种通用途径是有用的,因为o -di-没有可靠的访问权限t -BuO取代的芳烃。介绍了在拥挤的磷基化合物合成中的应用。