It is a long journey of 8.5 to 9.5 hours at a minimum. The only direct train in the fall is a night train, departing Amsterdam around 22:30 and arriving in Zurich at 8 am. Is that what you want?
Otherwise, there are daytime trains with one connection in Germany or in Basel, taking the same length of time. This would be less expensive than a night train with sleeping accommodations.
The best way to get a good price is to book well in advance ( up to 6 months ahead), but recognize that these advance tickets are generally non-refundable and not flexible ( limited to the train you book).