Mannich Type Reactions of Acylhydrazones with Silyl Enolates for the Synthesis of b-Amino Ester, b-Amino Ketone, b-Lactam, Pyrazolidinone, and Pyrazolone Derivatives
Mannich Type Reactions of Acylhydrazones with Silyl Enolates for the Synthesis of b-Amino Ester, b-Amino Ketone, b-Lactam, Pyrazolidinone, and Pyrazolone Derivatives
p-Benzyloxybenzylamine (BOBA) resin. A new polymer-supported amine used in solid-phase organic synthesis
作者:Shū Kobayashi、Yoji Aoki
DOI:10.1016/s0040-4039(98)01576-7
日期:1998.10
A new type of polymer-supported amine, p-benzyloxybenzylamine (BOBA) resin, has been developed. BOBA resin is readily prepared from Merrifield's resin in two steps. Polymer-supported imines prepared from aldehydes and BOBA resin reacted with silyl enolates in the presence of a catalytic amount of Yb(OTf)(3) to afford the corresponding adducts. Cleavage from the polymer support was carried our using TMSOTf or DDQ to give different types of products in good yields. (C) 1998 Elsevier Science Ltd. All rights reserved.
Mannich Type Reactions of Acylhydrazones with Silyl Enolates for the Synthesis of b-Amino Ester, b-Amino Ketone, b-Lactam, Pyrazolidinone, and Pyrazolone Derivatives