Efficient and modular syntheses of chiral 2-(2-hydroxyaryl)alcohols (HAROLs), novel 1,4-diols carrying one phenolic and one alcohol hydroxyl group, have been developed which led to generation of a small library of structurally diverse HAROLs in enantiomerically pure form. Of the different HAROLs examined, a HAROL based on the indan backbone exhibited the highest activity and enantioselectivity in the 1,2-addition of certain organometallic compounds to aldehydes in the presence of Ti(OⁱPr)₄ (up to 97% y, 88% ee) and performed as a hydrogen-bond donor organocatalyst in the Morita-Baylis-Hillman reaction, promoted by trialkylphosphines.

中文翻译：

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具有1,4-二醇骨架的手性2-（2-羟基芳基）醇（HAROLs）作为新的配体和有机催化剂家族

高效和模块化的手性2-（2-羟基芳基）醇（HAROLs）的合成，带有一个酚和一个醇羟基的新型1,4-二醇已被开发出来，这导致在对映异构体中生成结构多样的HAROLS小文库纯形式。在考察的不同HAROL中，基于茚满骨架的HAROL在Ti（O ⁱ Pr）₄（y高达97％， 88％ee）并在三田膦的促进下在Morita-Baylis-Hillman反应中作为氢键供体有机催化剂发挥作用。