“…In the previous papers we designed and described effective synthetic routes to unsaturated crowned compounds with variable length of the conjugation chain (one or two C ¼ C bonds), crown-ether ring size and nature of terminal polar group [1][2][3][4]. Below, we present a new example of successful application of this synthetic strategy for the preparation of retinal analogs.…”
“…In the previous papers we designed and described effective synthetic routes to unsaturated crowned compounds with variable length of the conjugation chain (one or two C ¼ C bonds), crown-ether ring size and nature of terminal polar group [1][2][3][4]. Below, we present a new example of successful application of this synthetic strategy for the preparation of retinal analogs.…”
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