NEW YORK, Sept 10 (Reuters) - The Royal Bank of Scotland (RBS.L: Quote, Profile, Research) sold on Wednesday $2 billion of floating-rate extendible notes with a six-year final maturity in the 144A private-placing market, said International Financing Review, a Thomson Reuters publication.

The notes, extendible from one to six years, have an initial coupon rate of 40 basis points over the three-month London interbank offered rate, or LIBOR. The coupon rate adjusts yearly to 42, 44, 46 and finally to 48 basis points over the three-month LIBOR in the fifth and sixth years of maturity.

RBS Greenwich Capital was the lead manager of the sale, IFR said. (Reporting by Rodrigo Campos)