sure! try it! but they won't be chipotles, they will be smoked, dried green jalapenos. everything i've ever read says chipotles are made from ripe
"Typically, a grower will pass through a jalapeņo field multiple times, picking the best green jalapeņos for market. At the end of the growing season, jalapeņos naturally begin to turn bright orange. There is an extensive fresh market for red jalapeņos in both Mexico and the United States. They are kept on the vine as long as possible. When the jalapeņos are deep red and have lost much of their moisture, they are selected to be made into chipotles. Many U.S. growers instead disk
the red jalapeņos into the ground."
the best way to get red jalapenos is to grow your own.