Titanium Chelation in Regioselective Michael Additions to Conjugated Dienones and Trienones.
摘要:
The site of Michael addition of beta-hetero atom substituted thiols (such as mercaptoethanol) to unsubstituted 2, 4-dienone and 2, 4, 6-trienones is at the terminal (omega) position. This site preference is transferred to the beta site when the addition is accomplished using Ti+4 complexation. These beta site addition products rapidly rearrange to the omega position on base treatment. (C) 1997 Elsevier Science Ltd.
Titanium Chelation in Regioselective Michael Additions to Conjugated Dienones and Trienones.
摘要:
The site of Michael addition of beta-hetero atom substituted thiols (such as mercaptoethanol) to unsubstituted 2, 4-dienone and 2, 4, 6-trienones is at the terminal (omega) position. This site preference is transferred to the beta site when the addition is accomplished using Ti+4 complexation. These beta site addition products rapidly rearrange to the omega position on base treatment. (C) 1997 Elsevier Science Ltd.
Titanium Chelation in Regioselective Michael Additions to Conjugated Dienones and Trienones.
作者:Stephen J Brocchini、Richard G Lawton
DOI:10.1016/s0040-4039(97)01452-4
日期:1997.9
The site of Michael addition of beta-hetero atom substituted thiols (such as mercaptoethanol) to unsubstituted 2, 4-dienone and 2, 4, 6-trienones is at the terminal (omega) position. This site preference is transferred to the beta site when the addition is accomplished using Ti+4 complexation. These beta site addition products rapidly rearrange to the omega position on base treatment. (C) 1997 Elsevier Science Ltd.