A facile synthesis of the spiroindoline-based growth hormone secretagogue, MK-677
XL Qi, EQ Yang, JT Zhang, T Wang, XP Cao
Index: Qi, Xian Liang; Yang, Er Qun; Zhang, Jun Tao; Wang, Tao; Cao, Xiao Ping Chinese Chemical Letters, 2012 , vol. 23, # 6 p. 661 - 664
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Abstract
A facile and improved route for the synthesis of the orally active spiroindoline-based growth hormone secretagogue, MK-677 was described. The key step adopted the Fischer indole/reduction strategy. The preparation of the key intermediates N-protected piperidine carboxaldehyde 5 and the N-Boc-O-benzyl-d-serine (2) are also optimized.
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