Crystal of spiroketal derivatives and process for preparation of spiroketal derivatives

摘要

The present invention provides a process for preparing a spiroketal derivative, via an intermediate represented by Formula (VI):;
wherein variable groups and numbers are as defined in the specification, which can be produced from dihalobenzene derivatives in one pot reaction.

主权项

1. A crystal of a compound represented by Formula (XI): which is a monohydrate, and which has peaks at diffraction angles (2θ) of about 3.5 °, 6.9°, and 13.8° in X-ray powder diffraction pattern.