E-commerce major Amazon has sent a notice to Future Group promoters asking them to refrain from entering into any kind of transaction with Reliance Industries group either directly or indirectly, a source aware of the development said on Tuesday. The notice follows reports that the Future group is in the midst of negotiations with Mukesh Dhirubhai Ambani (Reliance Industries Limited) Group (MDA Group) for the sale of its supply chain and logistics businesses.