H1B Extension + H1B Transfer case. CAN I GO AND START WORKING WITH EMPLOYER-B WITHOUT APPROVAL

My current H1B got expired on Sep 30th, 2016. and current employer initiated a H1B Extn on normal process on Sep 29th, 2016 and got the receipt number. Also EMPLOYER-B did initiated a H1B Transfer on Sept 23rd, 2016 and got receipt number, and initiated as PREMIUM on Nov first week. Now my question is CAN I GO AND START WORKING WITH EMPLOYER-B WITHOUT APPROVAL, means can i go and work with h1b transfer receipt on current scenario. Any response is appreciated.