A system for the production of C 3 and C 4 products, comprising: an epoxide source; a carbon monoxide source; a central reactor, comprising: an inlet configured to receive epoxide from the epoxide source and CO from the CO source, a central reaction zone configured to convert at least some of the epoxide to a beta lactone, and an outlet configured to provide an outlet stream comprising the beta lactone, two or more of (i)-(iii): (i) a first C 3 reactor, comprising: an inlet configured to receive the outlet stream comprising beta lactone of the central reactor, a first C 3 reaction zone configured to convert at least some of the beta lactone to a first C 3 product, and an outlet configured to provide an outlet stream comprising the first C 3 product, (ii) a second C 3 reactor, comprising: an inlet configured to receive the outlet stream comprising beta lactone of the central reactor, a second C 3 reaction zone configured to convert at least some of the beta lactone to a second C 3 product, and an outlet configured to provide an outlet stream comprising the second C 3 product, and (iii) a first C 4 reactor, comprising: an inlet configured to receive the outlet stream comprising beta lactone of the central reactor, a first C 4 reaction zone configured to convert at least some of the beta lactone to a first C 4 product, and an outlet configured to provide an outlet stream comprising the first C 4 product, and a controller to independently modulate production of the beta lactone and each of the products, provided that the first C 3 product differs from the second C 3 product. an epoxide source; a carbon monoxide source; a central reactor, comprising: an inlet configured to receive epoxide from the epoxide source and CO from the CO source, a central reaction zone configured to convert at least some of the epoxide to a beta lactone, and an outlet configured to provide an outlet stream comprising the beta lactone, an inlet configured to receive epoxide from the epoxide source and CO from the CO source, a central reaction zone configured to convert at least some of the epoxide to a beta lactone, and an outlet configured to provide an outlet stream comprising the beta lactone, two or more of (i)-(iii): (i) a first C 3 reactor, comprising: an inlet configured to receive the outlet stream comprising beta lactone of the central reactor, a first C 3 reaction zone configured to convert at least some of the beta lactone to a first C 3 product, and an outlet configured to provide an outlet stream comprising the first C 3 product, (ii) a second C 3 reactor, comprising: an inlet configured to receive the outlet stream comprising beta lactone of the central reactor, a second C 3 reaction zone configured to convert at least some of the beta lactone to a second C 3 product, and an outlet configured to provide an outlet stream comprising the second C 3 product, and (iii) a first C 4 reactor, comprising: an inlet configured to receive the outlet stream comprising beta lactone of the central reactor, a first C 4 reaction zone configured to convert at least some of the beta lactone to a first C 4 product, and an outlet configured to provide an outlet stream comprising the first C 4 product, and a controller to independently modulate production of the beta lactone and each of the products, (i) a first C 3 reactor, comprising: an inlet configured to receive the outlet stream comprising beta lactone of the central reactor, a first C 3 reaction zone configured to convert at least some of the beta lactone to a first C 3 product, and an outlet configured to provide an outlet stream comprising the first C 3 product, an inlet configured to receive the outlet stream comprising beta lactone of the central reactor, a first C 3 reaction zone configured to convert at least some of the beta lactone to a first C 3 product, and an outlet configured to provide an outlet stream comprising the first C 3 product, (ii) a second C 3 reactor, comprising: an inlet configured to receive the outlet stream comprising beta lactone of the central reactor, a second C 3 reaction zone configured to convert at least some of the beta lactone to a second C 3 product, and an outlet configured to provide an outlet stream comprising the second C 3 product, and an inlet configured to receive the outlet stream comprising beta lactone of the central reactor, a second C 3 reaction zone configured to convert at least some of the beta lactone to a second C 3 product, and an outlet configured to provide an outlet stream comprising the second C 3 product, and (iii) a first C 4 reactor, comprising: an inlet configured to receive the outlet stream comprising beta lactone of the central reactor, a first C 4 reaction zone configured to convert at least some of the beta lactone to a first C 4 product, and an outlet configured to provide an outlet stream comprising the first C 4 product, and a controller to independently modulate production of the beta lactone and each of the products, an inlet configured to receive the outlet stream comprising beta lactone of the central reactor, a first C 4 reaction zone configured to convert at least some of the beta lactone to a first C 4 product, and an outlet configured to provide an outlet stream comprising the first C 4 product, and a controller to independently modulate production of the beta lactone and each of the products, provided that the first C 3 product differs from the second C 3 product.