An Efficient Synthesis of 7-(Arylmethyl)-3-tert-butyl-1-phenyl-6,7-dihydro-1H,4H-pyrazolo[3,4-d][1,3]oxazines
作者:Rodrigo Abonia、Juan Castillo、Braulio Insuasty、Jairo Quiroga、Manuel Nogueras、Justo Cobo
DOI:10.1002/ejoc.201000678
日期:2010.11
An efficient and three-step procedure for the synthesis of novel 6,7-dihydro-1H,4H-pyrazolo[3,4-d][1,3]oxazine derivatives in good to excellent yields by treatment of pyrazolamines with aqueous formaldehyde in the presence of acetic acid is provided. The reactions proceeded through an intramolecular etherification process by dehydration of a 1,5-diol intermediate formed in the course of the reaction
一种高效的三步法合成新型 6,7-二氢-1H,4H-吡唑并[3,4-d][1,3] 恶嗪衍生物提供乙酸的存在。通过在反应过程中形成并由酸介质促进的 1,5-二醇中间体脱水,通过分子内醚化过程进行反应。