The present invention relates to novel processes for preparing 6-(difluoromethoxy)[1] benzofuro[3,2-c]pyridine-9-carbaldehyde, which is a novel and useful intermediate for preparing compounds with PDE4 inhibitory activity, such as 3,5-dichloro-4-(6-difluoromethoxybenzo[4,5]furo[3,2-c]pyridin-9-ylcarboxamido)-1-pyridiniumolate.
本发明涉及一种制备6-(二
氟甲氧基)[1]苯并呋[3,2-c]
吡啶-9-
甲醛的新工艺,该化合物是制备具有PDE4抑制活性的化合物的新型有用中间体,例如3,5-二
氯-4-(6-
二氟甲氧基苯并[4,5]呋[3,2-c]
吡啶-9-基羧酰胺)-1-
吡啶酸盐。