SYDNEY (Reuters) - Chinese online retailer JD.com is raising $1.5 billion via a convertible bond sale, according to the company's regulatory filings on Tuesday.

The five-year put-three deal was launched after the Hong Kong trading session closed, and ahead of the stock's open in New York.

The deal is being marketed with a zero to 0.25% coupon paid semi-annually, according to a term sheet seen by Reuters. Potential investors are being told there is a 35% conversion premium over the reference price of JD.com of HK$132, the stock's closing price on Tuesday.

JD.com plans to use the cash raised to expand its overseas business operations, improve its supply chain network and for potential share repurchases, the term sheet said.

Final pricing on the deal is due before the start of New York trading, according to the term sheet.

There is a $225 million greenshoe option attached to the transaction.

(Reporting by John Biju in Bengaluru; Editing by Kirsten Donovan)

By Scott Murdoch