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In this paper, an efficient synthesis of cyclopentenyl ketones and cyclohexenyl ketones through tertiary phosphine catalyzed [3+2] and [4+2] annulations of 1,2-allenic ketones with activated alkenes has been developed. Compared with published synthetic methods on cyclopentenyl ketones and cyclohexenyl ketones, the protocols developed in this paper have the advantages such as readily available starting...
HTEMPO-functionalized central cores were formed with divinylbenzene in “core first” method, and the four or five arms star polymers were built via controlled/living free radical photopolymerization. The four arms star polymers were also prepared with controlled/living free radical photopolymerization in “arm first” method. The resulting polymers had been confirmed by GPC and 1 H NMR. It showed...
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